h\u1ecdc t\u1eadp<\/a> c\u1ee7a c\u00e1c em. C\u00e1ch t\u00ednh c\u00f4ng su\u1ea5t s\u1ebd l\u00e0 \u1ee9ng d\u1ee5ng \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng nhi\u1ec1u nh\u1ea5t. C\u00e1c em s\u1ebd x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c c\u00f4ng su\u1ea5t c\u1ee7a m\u1ed9t l\u1ef1c d\u1ef1a v\u00e0o c\u00e1ch t\u00ednh n\u00e0y. Trong c\u00e1c b\u00e0i t\u1eadp tr\u00ean l\u1edbp, c\u00e1c em s\u1ebd \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p c\u00e2u h\u1ecfi n\u00e0y c\u00f9ng nhi\u1ec1u d\u1ea1ng b\u00e0i kh\u00e1c. C\u00e1c em n\u00ean ch\u00fa \u00fd \u0111\u1ec3 l\u00e0m b\u00e0i ch\u00ednh x\u00e1c h\u01a1n.<\/p>\n\n\n\nC\u00f4ng th\u1ee9c t\u00ednh c\u00f4ng su\u1ea5t \u2013 c\u00e1ch t\u00ednh c\u00f4ng su\u1ea5t<\/p>\n\n\n\n
C\u00f4ng th\u1ee9c \u0111\u1ec3 t\u00ednh c\u00f4ng su\u1ea5t v\u00f4 c\u00f9ng d\u1ec5 hi\u1ec3u v\u00e0 \u0111\u01a1n gi\u1ea3n. Nh\u01b0 ch\u00fang ta \u0111\u00e3 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn ph\u00eda tr\u00ean c\u00f4ng su\u1ea5t ph\u1ee5 thu\u1ed9c v\u00e0o c\u00f4ng c\u01a1 h\u1ecdc v\u00e0 th\u1eddi gian. Nh\u01b0 v\u1eady, c\u00f4ng th\u1ee9c c\u00e1ch t\u00ednh c\u00f4ng su\u1ea5t c\u0169ng d\u1ef1a tr\u00ean \u0111i\u1ec1u n\u00e0y. C\u00f4ng th\u1ee9c \u0111\u1ec3 t\u00ednh c\u00f4ng su\u1ea5t c\u1ee7a m\u1ed9t l\u1ef1c nh\u01b0 sau:<\/p>\n\n\n\n
P = A\/t<\/p>\n\n\n\n
Trong \u0111\u00f3 P ch\u00ednh l\u00e0 \u0111\u1ed9 l\u1edbn c\u1ee7a c\u00f4ng su\u1ea5t hay ch\u00ednh l\u00e0 k\u00ed hi\u1ec7u c\u1ee7a c\u00f4ng su\u1ea5t. M\u1eb7c d\u00f9 c\u00f9ng l\u00e0 P, tuy nhi\u00ean c\u00e1c em c\u1ea7n ph\u1ea3i ph\u00e2n bi\u1ec7t \u0111\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 tr\u1ecdng l\u1ef1c (P). A ch\u00ednh l\u00e0 \u0111\u1ed9 l\u1edbn c\u1ee7a c\u00f4ng c\u01a1 h\u1ecdc \u0111\u00e3 \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u trong b\u00e0i vi\u1ebft tr\u01b0\u1edbc. C\u00f2n t ch\u00ednh l\u00e0 th\u1eddi gian m\u00e0 v\u1eadt di chuy\u1ec3n. \u0110\u01a1n v\u1ecb c\u1ee7a c\u00f4ng su\u1ea5t P theo \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng qu\u1ed1c t\u1ebf ch\u00ednh l\u00e0 J\/s. \u0110\u01a1n v\u1ecb c\u1ee7a c\u00f4ng c\u01a1 h\u1ecdc A l\u00e0 Jun, c\u00f2n \u0111\u01a1n v\u1ecb c\u1ee7a th\u1eddi gian trong c\u00f4ng th\u1ee9c n\u00e0y gi\u00e2y (s).<\/p>\n\n\n\n
C\u00e1ch t\u00ednh c\u00f4ng su\u1ea5t c\u00f3 kh\u00f3 kh\u00f4ng?<\/p>\n\n\n\n
V\u00ed d\u1ee5 b\u00e0i t\u1eadp<\/p>\n\n\n\n
C\u00f3 nh\u1eefng b\u00e0i h\u1ecdc s\u1ebd cho s\u1eb5n c\u00e1c em \u0111\u1ed9 l\u1edbn c\u1ee7a c\u00f4ng c\u01a1 h\u1ecdc A. Tuy nhi\u00ean, trong m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp kh\u00e1c, c\u00e1c em c\u1ea7n ph\u1ea3i t\u00ednh A tr\u01b0\u1edbc khi l\u1eafp v\u00e0o c\u00f4ng th\u1ee9c. \u0110\u1ec3 t\u00ednh \u0111\u01b0\u1ee3c A c\u00e1c em c\u1ea7n ph\u1ea3i x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c F v\u00e0 qu\u00e3ng \u0111\u01b0\u1eddng s. C\u00f4ng th\u1ee9c \u0111\u1ec3 t\u00ednh c\u00f4ng c\u01a1 h\u1ecdc nh\u01b0 sau: A = F\/s. Sau khi t\u00ednh \u0111\u01b0\u1ee3c A ch\u00fang ta m\u1edbi c\u00f3 th\u1ec3 l\u1eafp v\u00e0o c\u00f4ng th\u1ee9c c\u00e1ch t\u00ednh c\u00f4ng su\u1ea5t. \u0110\u00e2y ch\u00ednh l\u00e0 m\u1eb9o khi l\u00e0m b\u00e0i. C\u00e1c em c\u1ea7n ch\u00fa \u00fd \u0111\u1ebfn d\u1eef ki\u1ec7n \u0111\u1ec1 b\u00e0i \u0111\u00e3 cho. T\u1eeb \u0111\u00f3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c nh\u1eefng \u0111i\u1ec1u ch\u01b0a bi\u1ebft v\u00e0 t\u00ednh to\u00e1n theo y\u00eau c\u1ea7u \u0111\u1ec1 b\u00e0i \u0111\u00e3 cho.<\/p>\n\n\n\n
\u0110\u01a1n v\u1ecb c\u1ee7a c\u00f4ng su\u1ea5t<\/p>\n\n\n\n
Ch\u00fang ta \u0111\u00e3 bi\u1ebft \u0111\u01a1n v\u1ecb c\u1ee7a c\u00f4ng su\u1ea5t trong c\u00f4ng th\u1ee9c ph\u00eda tr\u00ean. Tuy nhi\u00ean \u0111\u00e2y ch\u1ec9 l\u00e0 \u0111\u01a1n v\u1ecb \u0111\u01b0\u1ee3c d\u00f9ng nhi\u1ec1u nh\u1ea5t \u0111\u1ec3 t\u00ednh to\u00e1n. Trong th\u1ef1c t\u1ebf, \u0111\u01a1n v\u1ecb c\u1ee7a c\u00f4ng su\u1ea5t c\u00f3 nhi\u1ec1u h\u01a1n nh\u01b0 v\u1eady. . \u0110\u01a1n v\u1ecb c\u00f4ng su\u1ea5t l\u00e0 o\u00e1t, k\u00ed hi\u1ec7u l\u00e0 W:<\/p>\n\n\n\n
1 W = 1 J\/s (Jun tr\u00ean gi\u00e2y).<\/p>\n\n\n\n
1 kW (kil\u00f4o\u00e1t) = 1 000 W.<\/p>\n\n\n\n
1 MW (m\u00eagao\u00e1t) = 1 000 000 W.<\/p>\n\n\n\n
H\u1ea7u h\u1ebft c\u00e1c \u0111\u01a1n v\u1ecb n\u00e0y \u0111\u1ec1u c\u00f3 th\u1ec3 quy \u0111\u1ed5i \u0111\u1ed9 l\u1edbn cho nhau. V\u00ec v\u1eady, c\u00e1c em kh\u00f4ng c\u1ea7n qu\u00e1 lo l\u1eafng v\u1ec1 \u0111\u01a1n v\u1ecb c\u1ee7a c\u00f4ng su\u1ea5t. N\u1ebfu \u0111\u1ec1 b\u00e0i kh\u00f4ng cho \u0111\u01a1n v\u1ecb chu\u1ea9n l\u00e0 W. C\u00e1c em ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 quy \u0111\u1ed5i v\u1ec1 W v\u00e0 t\u00ednh to\u00e1n b\u00ecnh th\u01b0\u1eddng. \u0110\u00e2y c\u0169ng ch\u00ednh l\u00e0 c\u00e1ch \u0111\u1ec3 c\u00e1c em l\u00e0m b\u00e0i \u0111\u01b0a ra k\u1ebft qu\u1ea3 chu\u1ea9n nh\u1ea5t. C\u00f3 nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p, v\u00ec l\u00e0m sai \u0111\u01a1n v\u1ecb. Kh\u00f4ng quy \u0111\u1ed5i ra \u0111\u01a1n v\u1ecb chu\u1ea9n, khi\u1ebfn cho k\u1ebft qu\u1ea3 t\u00ednh to\u00e1n cu\u1ed1i c\u00f9ng b\u1ecb sai. C\u00e1ch t\u00ednh c\u00f4ng su\u1ea5t d\u1ef1a v\u00e0o c\u00f4ng th\u1ee9c tr\u00ean c\u1ea7n ph\u1ea3i \u0111\u01b0a c\u00e1c s\u1ed1 li\u1ec7u v\u1ec1 \u0111\u01a1n v\u1ecb chu\u1ea9n \u0111\u1ec3 t\u00ednh.<\/p>\n\n\n\n
\u1ee8ng d\u1ee5ng c\u1ee7a c\u00f4ng su\u1ea5t \u2013 C\u00e1ch t\u00ednh c\u00f4ng su\u1ea5t<\/p>\n\n\n\n
C\u00f3 th\u1ec3, s\u1ebd c\u00f3 nhi\u1ec1u em th\u1eafc m\u1eafc, ch\u00fang ta c\u1ea7n t\u00ednh c\u00f4ng su\u1ea5t \u0111\u1ec3 l\u00e0m g\u00ec? Tr\u00ean th\u1ef1c t\u1ebf, vi\u1ec7c t\u00ednh c\u00f4ng su\u1ea5t gi\u00fap ch\u00fang ta so s\u00e1nh \u0111\u01b0\u1ee3c hi\u1ec7u qu\u1ea3 c\u00f4ng vi\u1ec7c. N\u1ebfu ch\u00fang ta ch\u1ec9 d\u1ef1a tr\u00ean l\u1ef1c, hay th\u1eddi gian. Ch\u00fang ta ch\u1ec9 c\u00f3 th\u1ec3 k\u1ebft lu\u1eadn l\u1ef1c m\u1ea1nh hay y\u1ebfu, th\u1eddi gian nhanh hay ch\u00e2m. Tuy nhi\u00ean khi t\u00ednh c\u00f4ng, th\u00ec ch\u00fang ta c\u00f3 th\u1ec3 k\u1ebft lu\u1eadn v\u1ec1 hi\u1ec7u qu\u1ea3 c\u00f4ng vi\u1ec7c c\u00f3 t\u1ed1t hay kh\u00f4ng? \u1ee8ng d\u1ee5ng t\u1ed1t nh\u1ea5t c\u1ee7a c\u00f4ng su\u1ea5t ch\u00ednh l\u00e0 \u0111\u1ec3 so s\u00e1nh ch\u1ea5t l\u01b0\u1ee3ng c\u00e1c m\u00e1y l\u00e0m vi\u1ec7c t\u1ed1t hay kh\u00f4ng.<\/p>\n\n\n\n
\u1ee8ng d\u1ee5ng c\u00f4ng su\u1ea5t<\/p>\n\n\n\n
Trong c\u00f9ng m\u1ed9t th\u1eddi gian, m\u00e1y n\u00e0o c\u00f3 c\u00f4ng su\u1ea5t l\u00e0m vi\u1ec7c t\u1ed1t h\u01a1n. Th\u00ec chi\u1ebfc m\u00e1y \u0111\u00f3 \u0111em \u0111\u1ebfn k\u1ebft qu\u1ea3 l\u00e0m vi\u1ec7c t\u1ed1t h\u01a1n. \u1ee8ng d\u1ee5ng c\u1ee7a c\u00e1ch t\u00ednh c\u00f4ng su\u1ea5t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u nh\u1ea5t trong c\u00f4ng nghi\u1ec7p m\u00e1y m\u00f3c. Ngo\u00e0i ra, c\u00f4ng su\u1ea5t c\u0169ng \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y. V\u00ed d\u1ee5 nh\u01b0 c\u00f4ng su\u1ea5t l\u00e0m vi\u1ec7c c\u1ee7a m\u1ed9t ng\u01b0\u1eddi, ho\u1eb7c m\u1ed9t nh\u00f3m ng\u01b0\u1eddi. \u0110\u00e2y ch\u00ednh l\u00e0 \u00fd ngh\u0129a c\u1ee7a c\u00f4ng su\u1ea5t. C\u00e1c em n\u00ean ghi nh\u1edb nh\u1eefng v\u00ed d\u1ee5 th\u1ef1c t\u1ebf n\u00e0y \u0111\u1ec3 l\u00e0m b\u00e0i v\u1eadn d\u1ee5ng t\u1ed1t nh\u1ea5t.<\/p>\n\n\n\n
D\u1ea1ng b\u00e0i c\u00e1ch t\u00ednh c\u00f4ng su\u1ea5t<\/p>\n\n\n\n
C\u00e1c d\u1ea1ng b\u00e0i xoay quanh ch\u1ee7 \u0111\u1ec1 c\u00e1ch t\u00ednh c\u00f4ng su\u1ea5t th\u01b0\u1eddng s\u1ebd l\u00e0 d\u1ea1ng b\u00e0i t\u00ednh to\u00e1n t\u1ef1 lu\u1eadn. V\u00ec ch\u1ee7 \u0111\u1ec1 n\u00e0y \u00edt c\u00f3 l\u00fd thuy\u1ebft n\u00ean vi\u1ec7c ra c\u00e2u h\u1ecfi tr\u1eafc nghi\u1ec7m c\u0169ng s\u1ebd h\u1ea1n ch\u1ebf h\u01a1n. Tuy nhi\u00ean, c\u00e1c em v\u1eabn s\u1ebd g\u1eb7p nh\u1eefng c\u00e2u h\u1ecfi tr\u1eafc nghi\u1ec7m v\u1ec1 t\u00ednh \u0111\u1ed9 l\u1edbn c\u00f4ng su\u1ea5t. Ho\u1eb7c c\u00e2u h\u1ecfi v\u1ec1 c\u00f4ng th\u1ee9c t\u00ednh c\u00f4ng su\u1ea5t. C\u00e1c em v\u1eabn n\u00ean ghi nh\u1edb v\u1ec1 c\u00f4ng th\u1ee9c chu\u1ea9n \u0111\u1ec3 ch\u1ecdn \u0111\u01b0\u1ee3c \u0111\u00e1p \u00e1n ch\u00ednh x\u00e1c.<\/p>\n\n\n\n
B\u00e0i t\u1eadp t\u1ef1 lu\u1eadn<\/p>\n\n\n\n
\u1ede d\u1ea1ng b\u00e0i t\u1ef1 lu\u1eadn, c\u00e1c em c\u00f3 th\u1ec3 ph\u1ea3i th\u1ef1c hi\u1ec7n nhi\u1ec1u c\u00e2u h\u1ecfi tr\u01b0\u1edbc khi \u0111\u1ebfn v\u1edbi c\u00e1ch t\u00ednh c\u00f4ng su\u1ea5t. C\u00e1c em c\u1ea7n ph\u1ea3i ph\u00e2n t\u00edch l\u1ef1c. X\u00e1c \u0111\u1ecbnh l\u1ef1c n\u00e0o g\u00e2y ra c\u00f4ng. T\u1eeb \u0111\u00f3 m\u1edbi c\u00f3 th\u1ec3 t\u00ednh \u0111\u1ed9 l\u1edbn c\u00f4ng su\u1ea5t trong tr\u01b0\u1eddng h\u1ee3p \u0111\u00f3. Ch\u1ec9 c\u1ea7n c\u00e1c em x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c chu\u1ea9n l\u1ef1c sinh c\u00f4ng v\u00e0 t\u00ednh \u0111\u01b0\u1ee3c \u0111\u1ed9 l\u1edbn c\u1ee7a c\u00f4ng. Th\u00ec vi\u1ec7c t\u00ednh c\u00f4ng su\u1ea5t s\u1ebd tr\u1edf n\u00ean \u0111\u01a1n gi\u1ea3n h\u01a1n bao gi\u1edd h\u1ebft.<\/p>\n\n\n\n
B\u00e0i t\u1eadp v\u1ec1 c\u00f4ng su\u1ea5t ph\u1ed5 bi\u1ebfn<\/p>\n\n\n\n
Tr\u00ean \u0111\u00e2y ch\u00ednh l\u00e0 nh\u1eefng l\u00fd thuy\u1ebft v\u00e0 c\u00f4ng th\u1ee9c v\u1ec1 ch\u1ee7 \u0111\u1ec1 c\u00e1ch t\u00ednh c\u00f4ng su\u1ea5t. Hy v\u1ecdng v\u1edbi nh\u1eefng ki\u1ebfn th\u1ee9c n\u00e0y, c\u00e1c em c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng hi\u1ec3u b\u00e0i h\u01a1n. Kh\u00f4ng ch\u1ec9 v\u1eady, vi\u1ec7c ghi nh\u1edb nh\u1eefng v\u00ed d\u1ee5 ch\u00fang t\u00f4i \u0111\u01b0a ra c\u00f3 th\u1ec3 gi\u00fap c\u00e1c em l\u00e0m b\u00e0i v\u1eadn d\u1ee5ng. \u0110\u00e2y ch\u00ednh l\u00e0 \u0111i\u1ec1u m\u00e0 ch\u00fang t\u00f4i mu\u1ed1n g\u1eedi g\u1eafm \u0111\u1ebfn c\u00e1c em sau khi \u0111\u1ecdc b\u00e0i vi\u1ebft n\u00e0y.<\/p>\n\n\n\n
C\u1ea3m \u01a1n c\u00e1c em \u0111\u00e3 \u0111\u00f3n \u0111\u1ecdc b\u00e0i vi\u1ebft c\u1ee7a ch\u00fang t\u00f4i. Tr\u00ean trang ch\u1ee7 c\u00f3 r\u1ea5t nhi\u1ec1u nh\u1eefng b\u00e0i vi\u1ebft kh\u00e1c v\u1ec1 ch\u1ee7 \u0111\u1ec1 v\u1eadt l\u00fd 8 nh\u01b0 C<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn Trong cu\u1ed9c s\u1ed1ng th\u01b0\u1eddng ng\u00e0y, ch\u00fang ta th\u01b0\u1eddng hay n\u00f3i \u0111\u1ebfn c\u00f4ng su\u1ea5t c\u1ee7a m\u1ed9t v\u1eadt. V\u1eady c\u00f4ng su\u1ea5t n\u00e0y l\u00e0 g\u00ec? C\u00e1ch t\u00ednh c\u00f4ng su\u1ea5t nh\u01b0 th\u1ebf n\u00e0o? L\u1eddi gi\u1ea3i \u0111\u00e1p cho nh\u1eefng c\u00e2u h\u1ecfi n\u00e0y c\u00f3 trong ch\u01b0\u01a1ng tr\u00ecnh v\u1eadt l\u00fd 8. Tuy nhi\u00ean, \u0111\u1ec3 \u0111em \u0111\u1ebfn […]<\/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":[4,7],"tags":[],"class_list":["post-1225","post","type-post","status-publish","format-standard","hentry","category-trung-hoc","category-vat-ly"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1225","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=1225"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1225\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=1225"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=1225"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=1225"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}