{"id":30843,"date":"2023-09-22T23:47:30","date_gmt":"2023-09-22T16:47:30","guid":{"rendered":"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2"},"modified":"2023-09-22T23:47:30","modified_gmt":"2023-09-22T16:47:30","slug":"dong-nang-la-gi-2","status":"publish","type":"post","link":"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2","title":{"rendered":"T\u00ecm hi\u1ec3u v\u1ec1 \u0111\u1ed9ng n\u0103ng v\u00e0 t\u1ea7m quan tr\u1ecdng c\u1ee7a n\u00f3"},"content":{"rendered":"<p>\u0110\u1ed9ng n\u0103ng l\u00e0 kh\u00e1i ni\u1ec7m ch\u1ec9 s\u1ef1 chuy\u1ec3n \u0111\u1ed5i c\u1ee7a n\u0103ng l\u01b0\u1ee3ng t\u1eeb m\u1ed9t h\u00ecnh th\u00e1i sang h\u00ecnh th\u00e1i kh\u00e1c. N\u00f3 l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng trong c\u00e1c qu\u00e1 tr\u00ecnh t\u1ed3n t\u1ea1i v\u00e0 ph\u00e1t tri\u1ec3n c\u1ee7a v\u1eadt ch\u1ea5t v\u00e0 c\u00e1c hi\u1ec7n t\u01b0\u1ee3ng t\u1ef1 nhi\u00ean. Hi\u1ec3u r\u00f5 v\u1ec1 \u0111\u1ed9ng n\u0103ng l\u00e0 c\u01a1 s\u1edf \u0111\u1ec3 x\u00e2y d\u1ef1ng v\u00e0 \u1ee9ng d\u1ee5ng c\u00f4ng ngh\u1ec7, khoa h\u1ecdc trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y. H\u00e3y c\u00f9ng kh\u00e1m ph\u00e1 t\u1ea7m quan tr\u1ecdng c\u1ee7a \u0111\u1ed9ng n\u0103ng v\u00e0 \u1ea3nh h\u01b0\u1edfng c\u1ee7a n\u00f3 \u0111\u1ebfn th\u1ebf gi\u1edbi xung quanh!<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_40 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" area-label=\"ez-toc-toggle-icon-1\"><label for=\"item-6ad16904a83a3\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;direction:ltr;\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/label><input  type=\"checkbox\" id=\"item-6ad16904a83a3\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#1_Dong_nang_la_gi\" title=\"1. \u0110\u1ed9ng n\u0103ng l\u00e0 g\u00ec?\">1. \u0110\u1ed9ng n\u0103ng l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#2_Nang_luong_va_cac_dang_cua_no\" title=\"2. N\u0103ng l\u01b0\u1ee3ng v\u00e0 c\u00e1c d\u1ea1ng c\u1ee7a n\u00f3.\">2. N\u0103ng l\u01b0\u1ee3ng v\u00e0 c\u00e1c d\u1ea1ng c\u1ee7a n\u00f3.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#3_Cac_hien_tuong_dien_hinh_ve_dong_nang_trong_cuoc_song_hang_ngay\" title=\"3. C\u00e1c hi\u1ec7n t\u01b0\u1ee3ng \u0111i\u1ec3n h\u00ecnh v\u1ec1 \u0111\u1ed9ng n\u0103ng trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y.\">3. C\u00e1c hi\u1ec7n t\u01b0\u1ee3ng \u0111i\u1ec3n h\u00ecnh v\u1ec1 \u0111\u1ed9ng n\u0103ng trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#4_Cong_thuc_va_don_vi_tinh_dong_nang\" title=\"4. C\u00f4ng th\u1ee9c v\u00e0 \u0111\u01a1n v\u1ecb t\u00ednh \u0111\u1ed9ng n\u0103ng.\">4. C\u00f4ng th\u1ee9c v\u00e0 \u0111\u01a1n v\u1ecb t\u00ednh \u0111\u1ed9ng n\u0103ng.<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#Cong_thuc_tinh_dong_nang\" title=\"C\u00f4ng th\u1ee9c t\u00ednh \u0111\u1ed9ng n\u0103ng:\">C\u00f4ng th\u1ee9c t\u00ednh \u0111\u1ed9ng n\u0103ng:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#Don_vi_tinh_dong_nang\" title=\"\u0110\u01a1n v\u1ecb t\u00ednh \u0111\u1ed9ng n\u0103ng:\">\u0110\u01a1n v\u1ecb t\u00ednh \u0111\u1ed9ng n\u0103ng:<\/a><ul class='ez-toc-list-level-4'><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#Mot_so_vi_du\" title=\"M\u1ed9t s\u1ed1 v\u00ed d\u1ee5:\">M\u1ed9t s\u1ed1 v\u00ed d\u1ee5:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#Dung_cong_thuc_va_don_vi_tinh_dong_nang\" title=\"D\u00f9ng c\u00f4ng th\u1ee9c v\u00e0 \u0111\u01a1n v\u1ecb t\u00ednh \u0111\u1ed9ng n\u0103ng:\">D\u00f9ng c\u00f4ng th\u1ee9c v\u00e0 \u0111\u01a1n v\u1ecb t\u00ednh \u0111\u1ed9ng n\u0103ng:<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#5_Ung_dung_cua_dong_nang_trong_co_hoc_va_dien_hoc\" title=\"5. \u1ee8ng d\u1ee5ng c\u1ee7a \u0111\u1ed9ng n\u0103ng trong c\u01a1 h\u1ecdc v\u00e0 \u0111i\u1ec7n h\u1ecdc.\">5. \u1ee8ng d\u1ee5ng c\u1ee7a \u0111\u1ed9ng n\u0103ng trong c\u01a1 h\u1ecdc v\u00e0 \u0111i\u1ec7n h\u1ecdc.<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#Ung_dung_cua_dong_nang_trong_co_hoc\" title=\"\u1ee8ng d\u1ee5ng c\u1ee7a \u0111\u1ed9ng n\u0103ng trong c\u01a1 h\u1ecdc:\">\u1ee8ng d\u1ee5ng c\u1ee7a \u0111\u1ed9ng n\u0103ng trong c\u01a1 h\u1ecdc:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#Ung_dung_cua_dong_nang_trong_dien_hoc\" title=\"\u1ee8ng d\u1ee5ng c\u1ee7a \u0111\u1ed9ng n\u0103ng trong \u0111i\u1ec7n h\u1ecdc:\">\u1ee8ng d\u1ee5ng c\u1ee7a \u0111\u1ed9ng n\u0103ng trong \u0111i\u1ec7n h\u1ecdc:<\/a><ul class='ez-toc-list-level-4'><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#Mot_so_vi_du-2\" title=\"M\u1ed9t s\u1ed1 v\u00ed d\u1ee5:\">M\u1ed9t s\u1ed1 v\u00ed d\u1ee5:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#Ung_dung_thuc_te\" title=\"\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf:\">\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf:<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#6_Su_lien_quan_giua_dong_nang_va_do_bien_thien_cua_luc_tac_dung_len_vat\" title=\"6. S\u1ef1 li\u00ean quan gi\u1eefa \u0111\u1ed9ng n\u0103ng v\u00e0 \u0111\u1ed9 bi\u1ebfn thi\u00ean c\u1ee7a l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt.\">6. S\u1ef1 li\u00ean quan gi\u1eefa \u0111\u1ed9ng n\u0103ng v\u00e0 \u0111\u1ed9 bi\u1ebfn thi\u00ean c\u1ee7a l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt.<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#Dinh_nghia\" title=\"\u0110\u1ecbnh ngh\u0129a:\">\u0110\u1ecbnh ngh\u0129a:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#Moi_lien_he\" title=\"M\u1ed1i li\u00ean h\u1ec7:\">M\u1ed1i li\u00ean h\u1ec7:<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#7_Bai_tap_van_dung_va_giai_bai_toan_lien_quan_den_dong_nang\" title=\"7. B\u00e0i t\u1eadp v\u1eadn d\u1ee5ng v\u00e0 gi\u1ea3i b\u00e0i to\u00e1n li\u00ean quan \u0111\u1ebfn \u0111\u1ed9ng n\u0103ng.\">7. B\u00e0i t\u1eadp v\u1eadn d\u1ee5ng v\u00e0 gi\u1ea3i b\u00e0i to\u00e1n li\u00ean quan \u0111\u1ebfn \u0111\u1ed9ng n\u0103ng.<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#Vi_du\" title=\"V\u00ed d\u1ee5:\">V\u00ed d\u1ee5:<\/a><ul class='ez-toc-list-level-4'><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#Loi_giai\" title=\"L\u1eddi gi\u1ea3i:\">L\u1eddi gi\u1ea3i:<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#8_Vi_du_ve_viec_chuyen_doi_nang_luong_chuyen_dong_thanh_cong_co_hoc_vi_du_coi_xay_gio_may_phat_dien_tu_gio\" title=\"8. V\u00ed d\u1ee5 v\u1ec1 vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng chuy\u1ec3n \u0111\u1ed9ng th\u00e0nh c\u00f4ng c\u01a1 h\u1ecdc (v\u00ed d\u1ee5: c\u1ed1i xay gi\u00f3, m\u00e1y ph\u00e1t \u0111i\u1ec7n t\u1eeb gi\u00f3)\">8. V\u00ed d\u1ee5 v\u1ec1 vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng chuy\u1ec3n \u0111\u1ed9ng th\u00e0nh c\u00f4ng c\u01a1 h\u1ecdc (v\u00ed d\u1ee5: c\u1ed1i xay gi\u00f3, m\u00e1y ph\u00e1t \u0111i\u1ec7n t\u1eeb gi\u00f3)<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#Coi_xay_gio\" title=\"C\u1ed1i xay gi\u00f3\">C\u1ed1i xay gi\u00f3<\/a><ul class='ez-toc-list-level-4'><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#Uu_diem\" title=\"\u01afu \u0111i\u1ec3m:\">\u01afu \u0111i\u1ec3m:<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#9_Ton_that_va_bao_toan_nang_luong_trong_cac_he_thong_chuyen_doi_nang_luong\" title=\"9. T\u1ed5n th\u1ea5t v\u00e0 b\u1ea3o to\u00e0n n\u0103ng l\u01b0\u1ee3ng trong c\u00e1c h\u1ec7 th\u1ed1ng chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng\">9. T\u1ed5n th\u1ea5t v\u00e0 b\u1ea3o to\u00e0n n\u0103ng l\u01b0\u1ee3ng trong c\u00e1c h\u1ec7 th\u1ed1ng chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#Bao_toan_nang_luong\" title=\"B\u1ea3o to\u00e0n n\u0103ng l\u01b0\u1ee3ng\">B\u1ea3o to\u00e0n n\u0103ng l\u01b0\u1ee3ng<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#10_Dinh_li_dong_nang_va_moi_lien_he_giua_dong_nang_va_do_bien_thien_cua_vat\" title=\"10. \u0110\u1ecbnh l\u00ed \u0111\u1ed9ng n\u0103ng v\u00e0 m\u1ed1i li\u00ean h\u1ec7 gi\u1eefa \u0111\u1ed9ng n\u0103ng v\u00e0 \u0111\u1ed9 bi\u1ebfn thi\u00ean c\u1ee7a v\u1eadt\">10. \u0110\u1ecbnh l\u00ed \u0111\u1ed9ng n\u0103ng v\u00e0 m\u1ed1i li\u00ean h\u1ec7 gi\u1eefa \u0111\u1ed9ng n\u0103ng v\u00e0 \u0111\u1ed9 bi\u1ebfn thi\u00ean c\u1ee7a v\u1eadt<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/ungdung.hotronghiencuu.com\/open\/dong-nang-la-gi-2\/#Moi_lien_he_giua_dong_nang_va_do_bien_thien_cua_vat\" title=\"M\u1ed1i li\u00ean h\u1ec7 gi\u1eefa \u0111\u1ed9ng n\u0103ng v\u00e0 \u0111\u1ed9 bi\u1ebfn thi\u00ean c\u1ee7a v\u1eadt\">M\u1ed1i li\u00ean h\u1ec7 gi\u1eefa \u0111\u1ed9ng n\u0103ng v\u00e0 \u0111\u1ed9 bi\u1ebfn thi\u00ean c\u1ee7a v\u1eadt<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"1_Dong_nang_la_gi\"><\/span>1. \u0110\u1ed9ng n\u0103ng l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ed9ng n\u0103ng l\u00e0 m\u1ed9t d\u1ea1ng n\u0103ng l\u01b0\u1ee3ng t\u1ed3n t\u1ea1i trong v\u1eadt th\u1ec3 khi n\u00f3 \u0111ang di chuy\u1ec3n. N\u00f3 \u0111\u01b0\u1ee3c xem nh\u01b0 l\u00e0 kh\u1ea3 n\u0103ng c\u1ee7a m\u1ed9t v\u1eadt th\u1ec3 \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00f4ng vi\u1ec7c ho\u1eb7c g\u00e2y ra c\u00e1c hi\u1ec7n t\u01b0\u1ee3ng kh\u00e1c th\u00f4ng qua chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a n\u00f3. \u0110\u1ed9ng n\u0103ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i t\u1eeb c\u00e1c ngu\u1ed3n kh\u00e1c nhau nh\u01b0 nhi\u1ec7t, \u00e1nh s\u00e1ng v\u00e0 \u0111i\u1ec7n.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"2_Nang_luong_va_cac_dang_cua_no\"><\/span>2. N\u0103ng l\u01b0\u1ee3ng v\u00e0 c\u00e1c d\u1ea1ng c\u1ee7a n\u00f3.<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>N\u0103ng l\u01b0\u1ee3ng l\u00e0 kh\u1ea3 n\u0103ng c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00f4ng vi\u1ec7c ho\u1eb7c g\u00e2y ra s\u1ef1 bi\u1ebfn \u0111\u1ed5i. C\u00f3 ba d\u1ea1ng ch\u00ednh c\u1ee7a n\u0103ng l\u01b0\u1ee3ng: \u0111\u1ed9ng l\u01b0\u1ee3ng, \u0111i\u1ec1u ki\u1ec7n ti\u00ean quy\u1ebft cho s\u1ef1 di chuy\u1ec3n; nhi\u1ec7t, li\u00ean quan \u0111\u1ebfn s\u1ef1 dao \u0111\u1ed9ng c\u1ee7a c\u00e1c ph\u00e2n t\u1eed; v\u00e0 \u0111i\u1ec7n, li\u00ean quan \u0111\u1ebfn lu\u1ed3ng \u0111i\u1ec7n qua h\u1ec7 th\u1ed1ng.<\/p>\n<ul>\n<li>\u0110\u1ed9ng l\u01b0\u1ee3ng: \u0110\u01b0\u1ee3c xem nh\u01b0 l\u00e0 &#8220;n\u0103ng l\u01b0\u1ee3ng di chuy\u1ec3n&#8221;, \u0111\u1ed9ng l\u01b0\u1ee3ng ph\u1ee5 thu\u1ed9c v\u00e0o kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 v\u1eadn t\u1ed1c c\u1ee7a v\u1eadt.<\/li>\n<li>Nhi\u1ec7t: L\u00e0 d\u1ea1ng ph\u1ed5 bi\u1ebfn nh\u1ea5t c\u1ee7a n\u0103ng l\u01b0\u1ee3ng v\u00e0 li\u00ean quan \u0111\u1ebfn s\u1ef1 dao \u0111\u1ed9ng c\u1ee7a c\u00e1c ph\u00e2n t\u1eed. Nhi\u1ec7t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i th\u00e0nh c\u00f4ng vi\u1ec7c th\u00f4ng qua c\u00e1c qu\u00e1 tr\u00ecnh nhi\u1ec7t \u0111\u1ed9ng.<\/li>\n<li>\u0110i\u1ec7n: \u0110\u01b0\u1ee3c t\u1ea1o ra b\u1edfi lu\u1ed3ng \u0111i\u1ec7n qua m\u1ed9t h\u1ec7 th\u1ed1ng, n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i th\u00e0nh c\u00e1c d\u1ea1ng kh\u00e1c nhau nh\u01b0 \u00e1nh s\u00e1ng ho\u1eb7c nhi\u1ec7t.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"3_Cac_hien_tuong_dien_hinh_ve_dong_nang_trong_cuoc_song_hang_ngay\"><\/span>3. C\u00e1c hi\u1ec7n t\u01b0\u1ee3ng \u0111i\u1ec3n h\u00ecnh v\u1ec1 \u0111\u1ed9ng n\u0103ng trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y.<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" alt=\"3. C\u00e1c hi\u1ec7n t\u01b0\u1ee3ng \u0111i\u1ec3n h\u00ecnh v\u1ec1 \u0111\u1ed9ng n\u0103ng trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y.\" src=\"https:\/\/monkeymedia.vcdn.com.vn\/upload\/web\/img\/dong-nang-1.jpg\" style=\"text-align: center; clear: both; display: block; margin: 0 auto;\" title=\"3. C\u00e1c hi\u1ec7n t\u01b0\u1ee3ng \u0111i\u1ec3n h\u00ecnh v\u1ec1 \u0111\u1ed9ng n\u0103ng trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y.\"\/><\/p>\n<p>Trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y, ta g\u1eb7p r\u1ea5t nhi\u1ec1u hi\u1ec7n t\u01b0\u1ee3ng li\u00ean quan \u0111\u1ebfn \u0111\u1ed9ng n\u0103ng. M\u1ed9t s\u1ed1 v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh l\u00e0:<\/p>\n<ul>\n<li>Khi b\u1ea1n ch\u1ea1y, b\u1ea1n s\u1eed d\u1ee5ng \u0111\u1ed9ng n\u0103ng \u0111\u1ec3 di chuy\u1ec3n c\u01a1 th\u1ec3 c\u1ee7a m\u00ecnh.<\/li>\n<li>Khi m\u1ed9t con quay quay, n\u00f3 c\u00f3 \u0111\u1ed9ng n\u0103ng v\u00e0 c\u00f3 th\u1ec3 l\u00e0m c\u00f4ng vi\u1ec7c nh\u01b0 k\u00e9o d\u00e2y ho\u1eb7c l\u00e0m xoay c\u00e1c b\u00e1nh r\u0103ng kh\u00e1c.<\/li>\n<li>M\u1ed9t qu\u1ea3 b\u00f3ng bay l\u00ean cao khi b\u1ea1n tung n\u00f3 l\u00ean kh\u00f4ng trung. \u0110i\u1ec1u n\u00e0y x\u1ea3y ra v\u00ec qu\u1ea3 b\u00f3ng c\u00f3 \u0111\u1ed9ng l\u01b0\u1ee3ng khi b\u1ea1n tung v\u00e0 sau \u0111\u00f3 bi\u1ebfn th\u00e0nh \u0111\u1ed9 cao khi ti\u1ebfp t\u1ee5c di chuy\u1ec3n l\u00ean tr\u1eddi.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"4_Cong_thuc_va_don_vi_tinh_dong_nang\"><\/span>4. C\u00f4ng th\u1ee9c v\u00e0 \u0111\u01a1n v\u1ecb t\u00ednh \u0111\u1ed9ng n\u0103ng.<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_dong_nang\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh \u0111\u1ed9ng n\u0103ng:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ed9ng n\u0103ng c\u1ee7a m\u1ed9t v\u1eadt \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00f4ng th\u1ee9c: K = 1\/2 mv^2, trong \u0111\u00f3 K l\u00e0 \u0111\u1ed9ng n\u0103ng, m l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt v\u00e0 v l\u00e0 v\u1eadn t\u1ed1c c\u1ee7a v\u1eadt. \u0110\u01a1n v\u1ecb t\u00ednh cho \u0111\u1ed9ng n\u0103ng l\u00e0 joule (J).<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Don_vi_tinh_dong_nang\"><\/span>\u0110\u01a1n v\u1ecb t\u00ednh \u0111\u1ed9ng n\u0103ng:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong h\u1ec7 SI, \u0111\u01a1n v\u1ecb t\u00ednh cho \u0111\u1ed9ng n\u0103ng l\u00e0 joule (J). M\u1ed9t joule \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh nh\u01b0 l\u01b0\u1ee3ng c\u00f4ng khi m\u1ed9t l\u1ef1c 1 newton t\u00e1c d\u1ee5ng qua m\u1ed9t kho\u1ea3ng c\u00e1ch 1 m\u00e9t.<\/p>\n<p>V\u00ed d\u1ee5: N\u1ebfu m\u1ed9t v\u1eadt c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 2 kg di chuy\u1ec3n v\u1edbi v\u1eadn t\u1ed1c 5 m\/s, ta c\u00f3 th\u1ec3 t\u00ednh \u0111\u01b0\u1ee3c \u0111\u1ed9ng n\u0103ng c\u1ee7a v\u1eadt b\u1eb1ng c\u00f4ng th\u1ee9c K = 1\/2 mv^2 = 1\/2 * 2 * (5)^2 = 25 J.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Mot_so_vi_du\"><\/span>M\u1ed9t s\u1ed1 v\u00ed d\u1ee5:<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>&#8211; \u0110\u1ed9ng n\u0103ng c\u1ee7a qu\u1ea3 b\u00f3ng r\u01a1i t\u1eeb tr\u00ean cao xu\u1ed1ng s\u00e0n nh\u00e0.<br \/>\n&#8211; \u0110\u1ed9ng n\u0103ng c\u1ee7a \u00f4 t\u00f4 di chuy\u1ec3n tr\u00ean \u0111\u01b0\u1eddng.<br \/>\n&#8211; \u0110\u1ed9ng n\u0103ng c\u1ee7a con ng\u01b0\u1eddi khi ch\u1ea1y ho\u1eb7c nh\u1ea3y.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Dung_cong_thuc_va_don_vi_tinh_dong_nang\"><\/span>D\u00f9ng c\u00f4ng th\u1ee9c v\u00e0 \u0111\u01a1n v\u1ecb t\u00ednh \u0111\u1ed9ng n\u0103ng:<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u0110\u1ec3 t\u00ednh to\u00e1n \u0111\u1ed9ng n\u0103ng c\u1ee7a m\u1ed9t v\u1eadt, ta c\u1ea7n bi\u1ebft kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 v\u1eadn t\u1ed1c c\u1ee7a v\u1eadt. Sau \u0111\u00f3, ta s\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c K = 1\/2 mv^2 \u0111\u1ec3 t\u00ednh to\u00e1n gi\u00e1 tr\u1ecb \u0111\u1ed9ng n\u0103ng. \u0110\u01a1n v\u1ecb t\u00ednh cho \u0111\u1ed9ng n\u0103ng l\u00e0 joule (J).<\/p>\n<h2><span class=\"ez-toc-section\" id=\"5_Ung_dung_cua_dong_nang_trong_co_hoc_va_dien_hoc\"><\/span>5. \u1ee8ng d\u1ee5ng c\u1ee7a \u0111\u1ed9ng n\u0103ng trong c\u01a1 h\u1ecdc v\u00e0 \u0111i\u1ec7n h\u1ecdc.<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Ung_dung_cua_dong_nang_trong_co_hoc\"><\/span>\u1ee8ng d\u1ee5ng c\u1ee7a \u0111\u1ed9ng n\u0103ng trong c\u01a1 h\u1ecdc:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; Trong c\u01a1 h\u1ecdc, \u0111\u1ed9ng n\u0103ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00ednh to\u00e1n c\u00e1c hi\u1ec7n t\u01b0\u1ee3ng chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a c\u00e1c v\u1eadt.<br \/>\n&#8211; \u0110\u1ed9ng n\u0103ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00ednh to\u00e1n c\u00f4ng su\u1ea5t v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c m\u00e1y m\u00f3c.<br \/>\n&#8211; C\u00f4ng th\u1ee9c v\u00e0 nguy\u00ean l\u00fd li\u00ean quan \u0111\u1ebfn \u0111\u1ed9ng n\u0103ng \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong vi\u1ec7c thi\u1ebft k\u1ebf c\u00e1c c\u1ea5u tr\u00fac v\u00e0 thi\u1ebft b\u1ecb c\u01a1 h\u1ecdc.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ung_dung_cua_dong_nang_trong_dien_hoc\"><\/span>\u1ee8ng d\u1ee5ng c\u1ee7a \u0111\u1ed9ng n\u0103ng trong \u0111i\u1ec7n h\u1ecdc:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&#8211; Trong \u0111i\u1ec7n h\u1ecdc, \u0111\u1ed9ng n\u0103ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5n \u0111\u1ec3 t\u00ednh to\u00e1n c\u00f4ng su\u1ea5t v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n nh\u01b0 m\u00e1y ph\u00e1t \u0111i\u1ec7n, motor&#8230;<br \/>\n&#8211; \u0110i\u1ec7n n\u0103ng \u0111\u01b0\u1ee3c chuy\u1ec3n t\u1eeb th\u00e0nh vi\u00ean n\u00e0y sang th\u00e0nh vi\u00ean kh\u00e1c th\u00f4ng qua c\u00e1c thi\u1ebft b\u1ecb chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng nh\u01b0 bi\u1ebfn \u00e1p, \u0111i\u1ec7n tr\u1edf&#8230;<br \/>\n&#8211; C\u00f4ng th\u1ee9c v\u00e0 nguy\u00ean t\u1eafc li\u00ean quan \u0111\u1ebfn \u0111\u1ed9ng n\u0103ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong vi\u1ec7c thi\u1ebft k\u1ebf v\u00e0 v\u1eadn h\u00e0nh c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Mot_so_vi_du-2\"><\/span>M\u1ed9t s\u1ed1 v\u00ed d\u1ee5:<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>&#8211; \u0110\u1ed9ng n\u0103ng c\u1ee7a m\u1ed9t con l\u1eafc \u0111i\u1ec7n t\u1eed trong m\u1ea1ch \u0111i\u1ec7n.<br \/>\n&#8211; \u0110\u1ed9ng n\u0103ng c\u1ee7a m\u1ed9t m\u00e1y ph\u00e1t \u0111i\u1ec7n t\u1eeb gi\u00f3.<br \/>\n&#8211; \u0110\u1ed9ng n\u0103ng c\u1ee7a m\u1ed9t \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Ung_dung_thuc_te\"><\/span>\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf:<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u1ee8ng d\u1ee5ng c\u1ee7a \u0111\u1ed9ng n\u0103ng trong c\u01a1 h\u1ecdc v\u00e0 \u0111i\u1ec7n h\u1ecdc r\u1ea5t ph\u1ed5 bi\u1ebfn trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y. V\u00ed d\u1ee5, khi ta l\u00e1i xe, c\u00f4ng su\u1ea5t v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a \u0111\u1ed9ng c\u01a1 \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n b\u1eb1ng c\u00f4ng th\u1ee9c li\u00ean quan \u0111\u1ebfn \u0111\u1ed9ng n\u0103ng. Trong ng\u00e0nh c\u00f4ng nghi\u1ec7p s\u1ea3n xu\u1ea5t, vi\u1ec7c thi\u1ebft k\u1ebf c\u00e1c m\u00e1y m\u00f3c v\u00e0 h\u1ec7 th\u1ed1ng chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng c\u0169ng d\u1ef1a tr\u00ean nguy\u00ean t\u1eafc v\u00e0 c\u00f4ng th\u1ee9c li\u00ean quan \u0111\u1ebfn \u0111\u1ed9ng n\u0103ng.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"6_Su_lien_quan_giua_dong_nang_va_do_bien_thien_cua_luc_tac_dung_len_vat\"><\/span>6. S\u1ef1 li\u00ean quan gi\u1eefa \u0111\u1ed9ng n\u0103ng v\u00e0 \u0111\u1ed9 bi\u1ebfn thi\u00ean c\u1ee7a l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt.<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Dinh_nghia\"><\/span>\u0110\u1ecbnh ngh\u0129a:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong v\u1eadt l\u00fd, \u0111\u1ed9ng n\u0103ng l\u00e0 m\u1ed9t d\u1ea1ng n\u0103ng l\u01b0\u1ee3ng m\u00e0 m\u1ed9t v\u1eadt c\u00f3 do chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a n\u00f3. \u0110\u1ed9 bi\u1ebfn thi\u00ean c\u1ee7a l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt l\u00e0 s\u1ef1 thay \u0111\u1ed5i c\u1ee7a c\u00e1c l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt trong qu\u00e1 tr\u00ecnh di chuy\u1ec3n. S\u1ef1 li\u00ean quan gi\u1eefa \u0111\u1ed9ng n\u0103ng v\u00e0 \u0111\u1ed9 bi\u1ebfn thi\u00ean c\u1ee7a l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi nguy\u00ean l\u00ed c\u01a1 b\u1ea3n c\u1ee7a c\u01a1 h\u1ecdc Newton: &#8220;L\u1ef1c net ho\u1ea1t \u0111\u1ed9ng tr\u00ean m\u1ed9t v\u1eadt b\u1eb1ng t\u1ed5ng c\u00e1c gia t\u1ed1c g\u00e2y ra cho v\u1eadt.&#8221;<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Moi_lien_he\"><\/span>M\u1ed1i li\u00ean h\u1ec7:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Khi m\u1ed9t v\u1eadt di chuy\u1ec3n trong kh\u00f4ng gian, c\u00e1c l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt s\u1ebd l\u00e0m thay \u0111\u1ed5i \u0111\u1ed9 bi\u1ebfn thi\u00ean c\u1ee7a n\u00f3. N\u1ebfu t\u1ed5ng c\u00e1c gia t\u1ed1c g\u00e2y ra cho v\u1eadt b\u1eb1ng kh\u00f4ng, t\u1ee9c l\u00e0 kh\u00f4ng c\u00f3 s\u1ef1 thay \u0111\u1ed5i trong \u0111\u1ed9 bi\u1ebfn thi\u00ean c\u1ee7a c\u00e1c l\u1ef1c, th\u00ec theo nguy\u00ean l\u00ed b\u1ea3o to\u00e0n n\u0103ng l\u01b0\u1ee3ng, t\u1ed5ng n\u0103ng l\u01b0\u1ee3ng c\u1ee7a h\u1ec7 th\u1ed1ng c\u0169ng \u0111\u01b0\u1ee3c b\u1ea3o to\u00e0n.<\/p>\n<p>Tuy nhi\u00ean, n\u1ebfu t\u1ed5ng c\u00e1c gia t\u1ed1c g\u00e2y ra cho v\u1eadt kh\u00e1c kh\u00f4ng, t\u1ee9c l\u00e0 c\u00f3 s\u1ef1 thay \u0111\u1ed5i trong \u0111\u1ed9 bi\u1ebfn thi\u00ean c\u1ee7a c\u00e1c l\u1ef1c, th\u00ec \u0111\u1ed9ng n\u0103ng c\u1ee7a v\u1eadt s\u1ebd thay \u0111\u1ed5i theo. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 b\u1eb1ng c\u00f4ng th\u1ee9c: \u0110\u1ed9ng n\u0103ng = 1\/2 x kh\u1ed1i l\u01b0\u1ee3ng x v\u1eadn t\u1ed1c^2. Khi l\u1ef1c net ho\u1ea1t \u0111\u1ed9ng tr\u00ean v\u1eadt kh\u00f4ng b\u1eb1ng kh\u00f4ng, t\u1ee9c l\u00e0 c\u00f3 s\u1ef1 thay \u0111\u1ed5i trong \u0111\u1ed9 bi\u1ebfn thi\u00ean c\u1ee7a c\u00e1c l\u1ef1c, \u0111\u1ed9ng n\u0103ng c\u1ee7a v\u1eadt s\u1ebd \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i t\u1eeb d\u1ea1ng n\u00e0y sang d\u1ea1ng kh\u00e1c.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"7_Bai_tap_van_dung_va_giai_bai_toan_lien_quan_den_dong_nang\"><\/span>7. B\u00e0i t\u1eadp v\u1eadn d\u1ee5ng v\u00e0 gi\u1ea3i b\u00e0i to\u00e1n li\u00ean quan \u0111\u1ebfn \u0111\u1ed9ng n\u0103ng.<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Vi_du\"><\/span>V\u00ed d\u1ee5:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>1. M\u1ed9t con xe \u0111i\u1ec7n c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 500kg di chuy\u1ec3n v\u1edbi v\u1eadn t\u1ed1c 20m\/s. T\u00ednh to\u00e1n \u0111\u1ed9ng n\u0103ng c\u1ee7a xe.<br \/>\n2. M\u1ed9t qu\u1ea3 c\u1ea7u r\u01a1i t\u1eeb m\u1ed9t chi\u1ec1u cao 10m. T\u00ednh to\u00e1n \u0111\u1ed9 bi\u1ebfn thi\u00ean c\u1ee7a l\u1ef1c h\u1ea5p d\u1eabn v\u00e0 t\u00ednh to\u00e1n t\u1ed5ng n\u0103ng l\u01b0\u1ee3ng ban \u0111\u1ea7u v\u00e0 cu\u1ed1i c\u00f9ng c\u1ee7a qu\u1ea3 c\u1ea7u.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Loi_giai\"><\/span>L\u1eddi gi\u1ea3i:<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>1. \u0110\u1ed9ng n\u0103ng c\u1ee7a xe \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00f4ng th\u1ee9c: \u0110\u1ed9ng n\u0103ng = 1\/2 x kh\u1ed1i l\u01b0\u1ee3ng x v\u1eadn t\u1ed1c^2. V\u1edbi kh\u1ed1i l\u01b0\u1ee3ng 500kg v\u00e0 v\u1eadn t\u1ed1c 20m\/s, ta c\u00f3: \u0110\u1ed9ng n\u0103ng = 1\/2 x 500 x (20)^2 = 100,000 J.<\/p>\n<p>2. \u0110\u1ed9 bi\u1ebfn thi\u00ean c\u1ee7a l\u1ef1c h\u1ea5p d\u1eabn \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00f4ng th\u1ee9c: \u0110\u1ed9 bi\u1ebfn thi\u00ean = kh\u1ed1i l\u01b0\u1ee3ng x gia t\u1ed1c r\u01a1i x chi\u1ec1u cao. V\u1edbi kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a qu\u1ea3 c\u1ea7u v\u00e0 gia t\u1ed1c r\u01a1i l\u00e0m tr\u00f2n \u0111\u1ebfn gi\u00e1 tr\u1ecb g\u1ea7n \u0111\u00fang c\u1ee7a gia t\u1ed1c tr\u1ecdng tr\u01b0\u1eddng, ta c\u00f3: \u0110\u1ed9 bi\u1ebfn thi\u00ean = 500 x 10 x 10 = 50,000 J.<\/p>\n<p>T\u1ed5ng n\u0103ng l\u01b0\u1ee3ng ban \u0111\u1ea7u c\u1ee7a qu\u1ea3 c\u1ea7u l\u00e0 n\u0103ng l\u01b0\u1ee3ng ti\u1ec1m n\u0103ng v\u00e0 t\u1ed5ng n\u0103ng l\u01b0\u1ee3ng cu\u1ed1i c\u00f9ng l\u00e0 t\u1ed5ng n\u0103ng l\u01b0\u1ee3ng ti\u1ec1m n\u0103ng v\u00e0 \u0111\u1ed9ng n\u0103ng.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"8_Vi_du_ve_viec_chuyen_doi_nang_luong_chuyen_dong_thanh_cong_co_hoc_vi_du_coi_xay_gio_may_phat_dien_tu_gio\"><\/span>8. V\u00ed d\u1ee5 v\u1ec1 vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng chuy\u1ec3n \u0111\u1ed9ng th\u00e0nh c\u00f4ng c\u01a1 h\u1ecdc (v\u00ed d\u1ee5: c\u1ed1i xay gi\u00f3, m\u00e1y ph\u00e1t \u0111i\u1ec7n t\u1eeb gi\u00f3)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Coi_xay_gio\"><\/span>C\u1ed1i xay gi\u00f3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u1ed9t v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh v\u1ec1 vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng chuy\u1ec3n \u0111\u1ed9ng th\u00e0nh c\u00f4ng c\u01a1 h\u1ecdc l\u00e0 c\u1ed1i xay gi\u00f3. C\u1ed1i xay gi\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng t\u1eeb h\u00e0ng th\u1ebf k\u1ef7 tr\u01b0\u1edbc \u0111\u1ec3 t\u1eadn d\u1ee5ng s\u1ee9c gi\u00f3 v\u00e0 bi\u1ebfn n\u00f3 th\u00e0nh c\u00f4ng su\u1ea5t c\u01a1 h\u1ecdc \u0111\u1ec3 m\u00e0i l\u00faa, nghi\u1ec1n b\u1ed9t hay sinh s\u1ea3n \u0111i\u1ec7n. C\u1ed1i xay gi\u00f3 ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c c\u00e1nh qu\u1ea1t \u0111\u01b0\u1ee3c g\u1eafn v\u00e0o tr\u1ee5c xoay v\u00e0 khi c\u00f3 gi\u00f3 th\u1ed5i qua, c\u00e1c c\u00e1nh qu\u1ea1t s\u1ebd quay v\u00e0 truy\u1ec1n \u0111\u1ed9ng cho con l\u1eafc ho\u1eb7c b\u00e1nh r\u0103ng \u0111\u1ec3 t\u1ea1o ra c\u00f4ng su\u1ea5t.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Uu_diem\"><\/span>\u01afu \u0111i\u1ec3m:<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>T\u1eadn d\u1ee5ng ngu\u1ed3n n\u0103ng l\u01b0\u1ee3ng t\u00e1i t\u1ea1o &#8211; Gi\u00f3 l\u00e0 m\u1ed9t ngu\u1ed3n n\u0103ng l\u01b0\u1ee3ng kh\u00f4ng m\u1ea5t \u0111i v\u00e0 c\u00f3 th\u1ec3 t\u00e1i t\u1ea1o, do \u0111\u00f3 vi\u1ec7c s\u1eed d\u1ee5ng c\u1ed1i xay gi\u00f3 kh\u00f4ng g\u00e2y \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng.<\/li>\n<li>Kinh t\u1ebf &#8211; V\u1edbi chi ph\u00ed ban \u0111\u1ea7u kh\u00e1 th\u1ea5p v\u00e0 kh\u00f4ng y\u00eau c\u1ea7u nhi\u00ean li\u1ec7u, c\u1ed1i xay gi\u00f3 c\u00f3 th\u1ec3 tr\u1edf th\u00e0nh m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng hi\u1ec7u qu\u1ea3 kinh t\u1ebf.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"9_Ton_that_va_bao_toan_nang_luong_trong_cac_he_thong_chuyen_doi_nang_luong\"><\/span>9. T\u1ed5n th\u1ea5t v\u00e0 b\u1ea3o to\u00e0n n\u0103ng l\u01b0\u1ee3ng trong c\u00e1c h\u1ec7 th\u1ed1ng chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>M\u1ed7i h\u1ec7 th\u1ed1ng chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111\u1ec1u g\u1eb7p ph\u1ea3i t\u1ed5n th\u1ea5t n\u0103ng l\u01b0\u1ee3ng, \u0111i\u1ec1u n\u00e0y l\u00e0 do c\u00e1c nguy\u00ean nh\u00e2n nh\u01b0 ma s\u00e1t, t\u1ecfa nhi\u1ec7t hay qu\u00e1 tr\u00ecnh bi\u1ebfn \u0111\u1ed5i kh\u00f4ng ho\u00e0n h\u1ea3o. T\u1ed5n th\u1ea5t n\u00e0y c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a h\u1ec7 th\u1ed1ng v\u00e0 l\u00e0m gi\u1ea3m c\u00f4ng su\u1ea5t c\u01a1 h\u1ecdc ho\u1eb7c \u0111i\u1ec7n \u0111\u01b0\u1ee3c t\u1ea1o ra.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Bao_toan_nang_luong\"><\/span>B\u1ea3o to\u00e0n n\u0103ng l\u01b0\u1ee3ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Tuy t\u1ed5n th\u1ea5t n\u0103ng l\u01b0\u1ee3ng x\u1ea3y ra trong qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i, nh\u01b0ng theo \u0110\u1ecbnh l\u00ed B\u1ea3o to\u00e0n N\u0103ng l\u01b0\u1ee3ng, t\u1ed5ng l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng trong m\u1ed9t h\u1ec7 th\u1ed1ng c\u1ee5m l\u1ea1i v\u1eabn \u0111\u01b0\u1ee3c b\u1ea3o to\u00e0n. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 d\u00f9 c\u00f3 t\u1ed5n th\u1ea5t, t\u1ed5ng c\u00f4ng su\u1ea5t c\u1ee7a h\u1ec7 th\u1ed1ng kh\u00f4ng b\u1ecb m\u1ea5t \u0111i v\u00e0 ch\u1ec9 chuy\u1ec3n \u0111\u1ed5i t\u1eeb d\u1ea1ng n\u00e0y sang d\u1ea1ng kh\u00e1c.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"10_Dinh_li_dong_nang_va_moi_lien_he_giua_dong_nang_va_do_bien_thien_cua_vat\"><\/span>10. \u0110\u1ecbnh l\u00ed \u0111\u1ed9ng n\u0103ng v\u00e0 m\u1ed1i li\u00ean h\u1ec7 gi\u1eefa \u0111\u1ed9ng n\u0103ng v\u00e0 \u0111\u1ed9 bi\u1ebfn thi\u00ean c\u1ee7a v\u1eadt<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ecbnh l\u00ed \u0111\u1ed9ng n\u0103ng l\u00e0 m\u1ed9t nguy\u00ean l\u00fd c\u01a1 b\u1ea3n trong v\u1eadt l\u00fd, cho bi\u1ebft r\u1eb1ng \u0111\u1ed9ng n\u0103ng c\u1ee7a m\u1ed9t v\u1eadt ph\u1ee5 thu\u1ed9c v\u00e0o kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 t\u1ed1c \u0111\u1ed9 c\u1ee7a v\u1eadt. \u0110\u1ecbnh l\u00ed n\u00e0y \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng c\u00f4ng th\u1ee9c: \u0110\u1ed9ng n\u0103ng (K) = 1\/2 x Kh\u1ed1i l\u01b0\u1ee3ng x V\u1eadn t\u1ed1c^2.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Moi_lien_he_giua_dong_nang_va_do_bien_thien_cua_vat\"><\/span>M\u1ed1i li\u00ean h\u1ec7 gi\u1eefa \u0111\u1ed9ng n\u0103ng v\u00e0 \u0111\u1ed9 bi\u1ebfn thi\u00ean c\u1ee7a v\u1eadt<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ed9 bi\u1ebfn thi\u00ean c\u1ee7a v\u1eadt l\u00e0 s\u1ef1 thay \u0111\u1ed5i v\u1ec1 v\u1ecb tr\u00ed ho\u1eb7c h\u00ecnh d\u1ea1ng c\u1ee7a v\u1eadt theo th\u1eddi gian. M\u1ed9t khi c\u00f3 s\u1ef1 thay \u0111\u1ed5i trong \u0111\u1ed9 bi\u1ebfn thi\u00ean, v\u00ed d\u1ee5 nh\u01b0 di chuy\u1ec3n t\u1eeb A sang B, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 g\u00e2y ra s\u1ef1 thay \u0111\u1ed5i trong \u0111\u1ed9ng n\u0103ng c\u1ee7a v\u1eadt. Theo \u0110\u1ecbnh l\u00ed C\u00f4ng b\u1ea3o to\u00e0n N\u0103ng l\u01b0\u1ee3ng, t\u1ed5ng l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng trong m\u1ed9t h\u1ec7 th\u1ed1ng kh\u00f4ng thay \u0111\u1ed5i, do \u0111\u00f3 khi c\u00f3 s\u1ef1 bi\u1ebfn thi\u00ean trong \u0111\u1ed9ng n\u0103ng, c\u00f3 ph\u1ea7n n\u00e0o \u0111\u00f3 \u0111\u00e3 \u0111\u01b0\u1ee3c chuy\u1ec3n t\u1eeb d\u1ea1ng n\u00e0y sang d\u1ea1ng kh\u00e1c.<\/p>\n<p>\u0110\u1ed9ng n\u0103ng l\u00e0 s\u1ef1 bi\u1ec3u hi\u1ec7n c\u1ee7a s\u1ee9c m\u1ea1nh v\u00e0 chuy\u1ec3n \u0111\u1ed9ng trong t\u1ef1 nhi\u00ean. N\u00f3 \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong m\u1ecdi ho\u1ea1t \u0111\u1ed9ng c\u1ee7a con ng\u01b0\u1eddi v\u00e0 c\u00e1c h\u1ec7 th\u1ed1ng t\u1ef1 nhi\u00ean. Hi\u1ec3u r\u00f5 v\u1ec1 \u0111\u1ed9ng n\u0103ng gi\u00fap ch\u00fang ta t\u1eadn d\u1ee5ng v\u00e0 \u1ee9ng d\u1ee5ng t\u1ed1i \u01b0u ngu\u1ed3n l\u1ef1c, t\u1eeb \u0111\u00f3 g\u00f3p ph\u1ea7n v\u00e0o s\u1ef1 ph\u00e1t tri\u1ec3n b\u1ec1n v\u1eefng c\u1ee7a x\u00e3 h\u1ed9i.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0110\u1ed9ng n\u0103ng l\u00e0 kh\u00e1i ni\u1ec7m ch\u1ec9 s\u1ef1 chuy\u1ec3n \u0111\u1ed5i c\u1ee7a n\u0103ng l\u01b0\u1ee3ng t\u1eeb m\u1ed9t h\u00ecnh th\u00e1i sang h\u00ecnh th\u00e1i kh\u00e1c. N\u00f3 l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng trong&#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29],"tags":[],"class_list":["post-30843","post","type-post","status-publish","format-standard","hentry","category-khai-niem-1"],"_links":{"self":[{"href":"https:\/\/ungdung.hotronghiencuu.com\/open\/wp-json\/wp\/v2\/posts\/30843","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ungdung.hotronghiencuu.com\/open\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ungdung.hotronghiencuu.com\/open\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ungdung.hotronghiencuu.com\/open\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ungdung.hotronghiencuu.com\/open\/wp-json\/wp\/v2\/comments?post=30843"}],"version-history":[{"count":0,"href":"https:\/\/ungdung.hotronghiencuu.com\/open\/wp-json\/wp\/v2\/posts\/30843\/revisions"}],"wp:attachment":[{"href":"https:\/\/ungdung.hotronghiencuu.com\/open\/wp-json\/wp\/v2\/media?parent=30843"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ungdung.hotronghiencuu.com\/open\/wp-json\/wp\/v2\/categories?post=30843"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ungdung.hotronghiencuu.com\/open\/wp-json\/wp\/v2\/tags?post=30843"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}