{"id":3348,"date":"2021-10-20T16:51:32","date_gmt":"2021-10-20T09:51:32","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=3348"},"modified":"2021-10-22T18:08:44","modified_gmt":"2021-10-22T11:08:44","slug":"trong-luong-la-gi-khoi-luong-la-gi-cong-thuc-tinh-don-vi-do","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/trong-luong-la-gi-khoi-luong-la-gi-cong-thuc-tinh-don-vi-do\/","title":{"rendered":"Tr\u1ecdng l\u01b0\u1ee3ng l\u00e0 g\u00ec? Kh\u1ed1i l\u01b0\u1ee3ng l\u00e0 g\u00ec? \u2013 C\u00f4ng th\u1ee9c t\u00ednh, \u0111\u01a1n v\u1ecb \u0111o"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u1ecdng l\u01b0\u1ee3ng l\u00e0 g\u00ec? Kh\u1ed1i l\u01b0\u1ee3ng l\u00e0 g\u00ec? \u0110\u00e2y l\u00e0 m\u1ed9t trong s\u1ed1 r\u1ea5t nhi\u1ec1u th\u1eafc m\u1eafc c\u1ee7a ng\u01b0\u1eddi d\u00f9ng m\u00e0 ch\u00fang t\u00f4i nh\u1eadn \u0111\u01b0\u1ee3c nhi\u1ec1u trong th\u1eddi gian qua. \u0110\u1ec3 c\u00f3 c\u00e2u tr\u1ea3 l\u1eddi ch\u00ednh x\u00e1c v\u00e0 \u0111\u1ea7y \u0111\u1ee7 nh\u1ea5t qu\u00fd kh\u00e1ch h\u00e0ng \u0111\u1eebng b\u1ecf l\u1ee1 b\u1ea5t k\u1ef3 th\u00f4ng tin trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y c\u1ee7a ch\u00fang t\u00f4i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ecm hi\u1ec3u chi ti\u1ebft v\u1ec1 tr\u1ecdng l\u01b0\u1ee3ng<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u1ecdng l\u01b0\u1ee3ng l\u00e0 g\u00ec ?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u1ecdng l\u01b0\u1ee3ng l\u00e0 s\u1ee9c n\u1eb7ng c\u1ee7a v\u1eadt \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n qua gi\u00e1 tr\u1ecb \u0111o c\u1ee7a c\u00e2n l\u00f2 xo hay l\u1ef1c k\u1ebf l\u00f2 xo. N\u00f3 bi\u1ec3u hi\u1ec7n \u0111\u1eb7c tr\u01b0ng cho l\u1ef1c n\u00e9n c\u1ee7a v\u1eadt l\u00ean m\u1eb7t s\u00e0n hay l\u1ef1c c\u0103ng do v\u1eadt g\u00e2y ra l\u00ean l\u00f2 xo c\u1ee7a l\u1ef1c k\u1ebf khi treo v\u1eadt v\u00e0o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong khoa h\u1ecdc k\u1ef9 thu\u1eadt, tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a v\u1eadt \u0111\u01b0\u1ee3c xem l\u00e0 l\u1ef1c m\u00e0 l\u1ef1c h\u1ea5p d\u1eabn t\u00e1c d\u1ee5ng l\u00ean v\u1eadt \u0111\u00f3. N\u00f3 \u0111\u01b0\u1ee3c k\u00ed hi\u1ec7u b\u1eb1ng ch\u1eef W<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ef1u chung, tr\u1ecdng l\u01b0\u1ee3ng l\u00e0 c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a tr\u1ecdng l\u1ef1c t\u00e1c l\u00ean v\u1eadt, n\u00f3 ph\u1ee5 thu\u1ed9c v\u00e0o kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt v\u00e0 gia t\u1ed1c tr\u1ecdng tr\u01b0\u1eddng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u01a1n v\u1ecb \u0111o tr\u1ecdng l\u01b0\u1ee3ng l\u00e0 g\u00ec?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u01a1n v\u1ecb \u0111o tr\u1ecdng l\u01b0\u1ee3ng l\u00e0 Newton, c\u00f3 k\u00ed hi\u1ec7u l\u00e0 N. Tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a v\u1eadt n\u1eb7ng 100g t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 1N.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f4ng th\u1ee9c t\u00ednh tr\u1ecdng l\u01b0\u1ee3ng<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f4ng th\u1ee9c t\u00ednh tr\u1ecdng l\u01b0\u1ee3ng theo kh\u1ed1i l\u01b0\u1ee3ng (c\u00f4ng th\u1ee9c li\u00ean h\u1ec7 gi\u1eefa tr\u1ecdng l\u01b0\u1ee3ng v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng) \u0111\u00f3 l\u00e0:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">P = m.g<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong \u0111\u00f3:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">P l\u00e0 tr\u1ecdng l\u01b0\u1ee3ng, \u0111\u01a1n v\u1ecb l\u00e0 N (niut\u01a1n, Newton (\u0111\u01a1n v\u1ecb))<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">m l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng, \u0111\u01a1n v\u1ecb l\u00e0 kg (kilogram)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">g: gia t\u1ed1c tr\u1ecdng tr\u01b0\u1eddng<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u00e1 tr\u1ecb g theo quy \u01b0\u1edbc trong ch\u01b0\u01a1ng tr\u00ecnh ph\u1ed5 th\u00f4ng c\u01a1 s\u1edf l\u00e0 9,81m\/s2 tuy nhi\u00ean th\u1ef1c t\u1ebf cho th\u1ea5y gi\u00e1 tr\u1ecb gia t\u1ed1c tr\u1ecdng tr\u01b0\u1eddng th\u01b0\u1eddng thay \u0111\u1ed5i theo \u0111\u1ed9 cao t\u1ea1i nh\u1eefng n\u01a1i ch\u1ecbu l\u1ef1c h\u00fat c\u1ee7a tr\u00e1i \u0111\u1ea5t do \u0111\u00f3, tr\u1ecdng l\u01b0\u1ee3ng c\u0169ng thay \u0111\u1ed5i theo. V\u00ed d\u1ee5 chi\u1ebfc m\u00e1y bay c\u00f3 c\u00e2n n\u1eb7ng 1000kg khi \u1edf s\u00e2n bay kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a n\u00f3 v\u1eabn l\u00e0 1000kg c\u00f2n tr\u1ecdng l\u01b0\u1ee3ng s\u1ebd b\u1eb1ng 1000kg nh\u00e2n v\u1edbi gi\u00e1 tr\u1ecb g t\u1ea1i s\u00e2n bay. Khi m\u00e1y bay c\u1ea5t c\u00e1nh \u0111\u1ebfn \u0111\u1ed9 cao 9km kh\u1ed1i l\u01b0\u1ee3ng v\u1eabn l\u00e0 1000kg nh\u01b0ng tr\u1ecdng l\u01b0\u1ee3ng s\u1ebd thay \u0111\u1ed5i b\u1edfi gia t\u1ed1c tr\u1ecdng tr\u01b0\u1eddng l\u00fac n\u00e0y \u0111\u00e3 thay \u0111\u1ed5i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ecm hi\u1ec3u chi ti\u1ebft v\u1ec1 kh\u1ed1i l\u01b0\u1ee3ng<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u1ed1i l\u01b0\u1ee3ng l\u00e0 th\u01b0\u1edbc \u0111o v\u1ec1 s\u1ed1 l\u01b0\u1ee3ng v\u1eadt ch\u1ea5t t\u1ea1o th\u00e0nh v\u1eadt th\u1ec3. Trong c\u01a1 h\u1ecdc c\u1ed5 \u0111i\u1ec3n, kh\u00e1i ni\u1ec7m tr\u1ecdng l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c hi\u1ec3u l\u00e0 s\u1ed1 v\u1eadt ch\u1ea5t c\u00f3 trong m\u1ed9t v\u1eadt. Kh\u1ed1i l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c hi\u1ec3u \u0111\u01a1n gi\u1ea3n nh\u1ea5t l\u00e0 s\u1ee9c n\u1eb7ng c\u1ee7a v\u1eadt tr\u00ean m\u1eb7t \u0111\u1ea5t. Sau khi Newton (Newton) t\u00ecm ra c\u00e1c \u0111\u1ecbnh lu\u1eadt c\u01a1 h\u1ecdc, kh\u00e1i ni\u1ec7m kh\u1ed1i l\u01b0\u1ee3ng \u0111\u00e3 \u0111\u01b0\u1ee3c hi\u1ec3u r\u1ed9ng h\u01a1n, \u0111\u00f3 l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt n\u00e0o c\u00f3 t\u1ef7 l\u1ec7 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng l\u1ef1c h\u1ea5p d\u1eabn c\u1ee7a v\u1eadt \u0111\u00f3 l\u00ean c\u00e1c v\u1eadt kh\u00e1c, do \u0111\u00f3 kh\u1ed1i l\u01b0\u1ee3ng m t\u1ec9 l\u1ec7 v\u1edbi tr\u1ecdng l\u01b0\u1ee3ng P qua g<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u1ec3u m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a m\u1ed9t v\u1eadt ch\u1ec9 l\u01b0\u1ee3ng ch\u1ea5t h\u00ecnh th\u00e0nh l\u00ean v\u1eadt \u0111\u00f3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u01a1n v\u1ecb kh\u1ed1i l\u01b0\u1ee3ng<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u01a1n v\u1ecb \u0111o kh\u1ed1i l\u01b0\u1ee3ng l\u00e0 kilogram (kg), c\u00f3 k\u00ed hi\u1ec7u l\u00e0 m. D\u1ee5ng c\u1ee5 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o kh\u1ed1i l\u01b0\u1ee3ng l\u00e0 c\u00e2n. M\u1ed9t s\u1ed1 lo\u1ea1i c\u00e2n th\u01b0\u1eddng g\u1eb7p \u0111\u00f3 l\u00e0 c\u00e2n \u0111\u00f2n, c\u00e2n \u0111\u1ed3ng h\u1ed3 v\u00e0 c\u00e2n y t\u1ebf.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ngo\u00e0i ra, ng\u01b0\u1eddi ta c\u0169ng hay s\u1eed d\u1ee5ng gam, t\u1ea5n, t\u1ea1 \u0111\u1ec3 l\u00e0m \u0111\u01a1n v\u1ecb \u0111o kh\u1ed1i l\u01b0\u1ee3ng. 1000 g = 1 kg, 1 t\u1ea1 = 100 kg, 1 t\u1ea5n = 1000 kg,\u2026<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5: Tr\u00ean v\u1ecf ngo\u00e0i h\u1ed9p s\u1eefa c\u00f3 ghi 397g th\u00ec \u0111\u00e2y ch\u00ednh l\u00e0 l\u01b0\u1ee3ng s\u1eefa c\u00f3 ch\u1ee9a trong h\u1ed9p.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u00e2n bi\u1ec7t s\u1ef1 kh\u00e1c nhau gi\u1eefa tr\u1ecdng l\u01b0\u1ee3ng v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u1ecdng l\u01b0\u1ee3ng v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng l\u00e0 kh\u00e1c nhau, \u0111i\u1ec1u \u0111\u00f3 \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n r\u00f5 r\u00e0ng nh\u1ea5t th\u00f4ng qua kh\u00e1i ni\u1ec7m. Tr\u1ecdng l\u01b0\u1ee3ng l\u00e0 c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a tr\u1ecdng l\u1ef1c t\u00e1c d\u1ee5ng l\u00ean v\u1eadt \u0111\u00f3, ph\u1ee5 thu\u1ed9c v\u00e0o kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt v\u00e0 gia t\u1ed1c tr\u1ecdng tr\u01b0\u1eddng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a m\u1ed9t v\u1eadt ch\u1ec9 t\u00ednh ch\u1ea5t c\u1ee7a v\u1eadt \u0111\u00f3 n\u00ean \u1edf b\u1ea5t c\u1ee9 n\u01a1i \u0111\u00e2u ngay c\u1ea3 m\u00f4i tr\u01b0\u1eddng ch\u00e2n kh\u00f4ng, d\u01b0\u1edbi \u0111\u00e1y \u0111\u1ea1i d\u01b0\u01a1ng hay v\u01b0\u1ee3t qua t\u1ea7ng \u0111\u1ed1i l\u01b0u c\u1ee7a tr\u00e1i \u0111\u1ea5t th\u00ec kh\u1ed1i l\u01b0\u1ee3ng v\u00e2ng kh\u00f4ng thay \u0111\u1ed5i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u1ecdng l\u01b0\u1ee3ng th\u00ec l\u1ea1i kh\u00e1c v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng, n\u00f3 th\u01b0\u1eddng bi\u1ebfn \u0111\u1ed5i v\u00e0 ph\u1ee5 thu\u1ed9c v\u00e0o kh\u1ed1i l\u01b0\u1ee3ng, gia t\u1ed1c tr\u1ecdng tr\u01b0\u1eddng. X\u00e9t tr\u00ean m\u1ed9t v\u1eadt c\u1ee5 th\u1ec3 th\u00ec kh\u1ed1i l\u01b0\u1ee3ng th\u01b0\u1eddng l\u00e0 c\u1ed1 \u0111\u1ecbnh n\u00ean l\u00fac n\u00e0y tr\u1ecdng l\u01b0\u1ee3ng ch\u1ec9 c\u00f2n ph\u1ee5 thu\u1ed9c v\u00e0o gia t\u1ed1c tr\u1ecdng tr\u01b0\u1eddng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hy v\u1ecdng nh\u1eefng th\u00f4ng tin tr\u00ean \u0111\u00e2y gi\u00fap b\u1ea1n tr\u1ea3 l\u1eddi \u0111\u01b0\u1ee3c c\u00e2u h\u1ecfi tr\u1ecdng l\u01b0\u1ee3ng l\u00e0 g\u00ec? Kh\u1ed1i l\u01b0\u1ee3ng l\u00e0 g\u00ec r\u1ed3i ch\u1ee9. N\u1ebfu c\u00f3 b\u1ea5t k\u1ef3 th\u1eafc m\u1eafc n\u00e0o qu\u00fd kh\u00e1ch h\u00e0ng h\u00e3y comment ph\u00eda d\u01b0\u1edbi b\u00e0i vi\u1ebft ho\u1eb7c li\u00ean h\u1ec7 tr\u1ef1c ti\u1ebfp v\u1edbi ch\u00fang t\u00f4i \u0111\u1ec3 \u0111\u01b0\u1ee3c <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">t\u01b0 v\u1ea5n<\/a>, gi\u1ea3i \u0111\u00e1p ho\u00e0n to\u00e0n mi\u1ec5n ph\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn Tr\u1ecdng l\u01b0\u1ee3ng l\u00e0 g\u00ec? Kh\u1ed1i l\u01b0\u1ee3ng l\u00e0 g\u00ec? \u0110\u00e2y l\u00e0 m\u1ed9t trong s\u1ed1 r\u1ea5t nhi\u1ec1u th\u1eafc m\u1eafc c\u1ee7a ng\u01b0\u1eddi d\u00f9ng m\u00e0 ch\u00fang t\u00f4i nh\u1eadn \u0111\u01b0\u1ee3c nhi\u1ec1u trong th\u1eddi gian qua. \u0110\u1ec3 c\u00f3 c\u00e2u tr\u1ea3 l\u1eddi ch\u00ednh x\u00e1c v\u00e0 \u0111\u1ea7y \u0111\u1ee7 nh\u1ea5t qu\u00fd kh\u00e1ch h\u00e0ng \u0111\u1eebng b\u1ecf l\u1ee1 b\u1ea5t k\u1ef3 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[7],"tags":[],"class_list":["post-3348","post","type-post","status-publish","format-standard","hentry","category-vat-ly"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/3348","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=3348"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/3348\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=3348"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=3348"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=3348"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}