Have you ever wondered how cargo ships weighing tens of thousands of tons can still float gently on the ocean without sinking? It seems magical, doesn\u2019t it! But in fact, it\u2019s all thanks to a special force called Archimedes\u2019 buoyant force, a scientific secret discovered more than 2,000 years ago.<\/span><\/p>\n V\u1eady l\u1ef1c \u0111\u1ea9y Acsimet l\u00e0 g\u00ec?<\/b> Khi m\u1ed9t v\u1eadt \u0111\u01b0\u1ee3c \u0111\u1eb7t v\u00e0o n\u01b0\u1edbc, n\u01b0\u1edbc s\u1ebd \u201c\u0111\u1ea9y l\u1ea1i\u201d v\u1eadt \u0111\u00f3 b\u1eb1ng m\u1ed9t l\u1ef1c h\u01b0\u1edbng l\u00ean tr\u00ean. L\u1ef1c n\u00e0y g\u1ecdi l\u00e0 l\u1ef1c \u0111\u1ea9y Acsimet. N\u1ebfu l\u1ef1c \u0111\u1ea9y n\u00e0y l\u1edbn h\u01a1n tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a v\u1eadt, v\u1eadt s\u1ebd n\u1ed5i; n\u1ebfu nh\u1ecf h\u01a1n, v\u1eadt s\u1ebd ch\u00ecm. Nh\u1edd \u201cs\u1ee9c \u0111\u1ee1\u201d \u0111\u1eb7c bi\u1ec7t n\u00e0y c\u1ee7a n\u01b0\u1edbc m\u00e0 t\u00e0u thuy\u1ec1n m\u1edbi c\u00f3 th\u1ec3 n\u1ed5i l\u00ean thay v\u00ec ch\u00ecm xu\u1ed1ng \u0111\u00e1y bi\u1ec3n.<\/span><\/p>\n When an object is placed in water, the water \u201cpushes back\u201d with an upward force. This force is cal<\/span>led Archimedes\u2019 buoyant force. If this f<\/b>orce is greater than the object\u2019s weight, the object will float; if it is smaller, the object will sink. Thanks to this special \u201csupport\u201d from the water, ships are able to stay afloat instead of sinking to the bottom of the sea.<\/span><\/p>\n C\u00f4ng th\u1ee9c t\u00ednh l\u1ef1c \u0111\u1ea9y Acsimet<\/b><\/p>\n Formula for calculating Archimedes\u2019 buoyant force:<\/b><\/p>\n FA = d.V = 10.D.V\u00a0<\/span><\/p>\n Trong \u0111\u00f3:\u00a0<\/span><\/p>\n FA = d.V = 10.D.V\u00a0<\/span><\/p>\n Where:<\/span><\/p>\n T\u1ea1i sao t\u00e0u l\u1edbn l\u1ea1i n\u1ed5i c\u00f2n h\u00f2n \u0111\u00e1 nh\u1ecf l\u1ea1i ch\u00ecm?<\/b> \u0110i\u1ec1u quan tr\u1ecdng kh\u00f4ng ph\u1ea3i l\u00e0 v\u1eadt n\u1eb7ng hay nh\u1eb9 m\u00e0 l\u00e0 \u0111\u1ed9 n\u1ed5i, hay n\u00f3i d\u1ec5 hi\u1ec3u l\u00e0 c\u00e1ch v\u1eadt chi\u1ebfm ch\u1ed7 trong n\u01b0\u1edbc. M\u1ed9t con t\u00e0u d\u00f9 n\u1eb7ng nh\u01b0ng c\u00f3 ph\u1ea7n th\u00e2n r\u1ed7ng, chi\u1ebfm r\u1ea5t nhi\u1ec1u th\u1ec3 t\u00edch n\u01b0\u1edbc, khi\u1ebfn l\u1ef1c \u0111\u1ea9y Acsimet r\u1ea5t l\u1edbn. Trong khi \u0111\u00f3, m\u1ed9t h\u00f2n \u0111\u00e1 nh\u1ecf nh\u01b0ng \u0111\u1eb7c v\u00e0 n\u1eb7ng, chi\u1ebfm \u00edt th\u1ec3 t\u00edch, n\u00ean l\u1ef1c \u0111\u1ea9y kh\u00f4ng \u0111\u1ee7 \u0111\u1ec3 gi\u00fap n\u00f3 n\u1ed5i.<\/span><\/p>\n What matters is not whether an object is heavy or light, but its buoyancy or more simply, how it displaces water. A ship may be heavy, but its hull is hollow and takes up a large volume of water, creating a very strong buoyant force. Meanwhile, a small stone is solid and dense, displacing very little water, so the buoyant force isn\u2019t enough to keep it afloat.<\/span><\/p>\n Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y x\u1ea3y ra th\u1ebf n\u00e0o trong th\u1ef1c t\u1ebf?<\/b> Nh\u1edd hi\u1ec3u r\u00f5 nguy\u00ean l\u00fd Acsimet, con ng\u01b0\u1eddi \u0111\u00e3 thi\u1ebft k\u1ebf ph\u1ea7n th\u00e2n t\u00e0u r\u1ed9ng, r\u1ed7ng gi\u00fap n\u01b0\u1edbc t\u1ea1o ra l\u1ef1c \u0111\u1ea9y l\u1edbn. D\u00f9 t\u00e0u ch\u1edf h\u00e0ng tr\u0103m container hay h\u00e0ng ng\u00e0n h\u00e0nh kh\u00e1ch, l\u1ef1c \u0111\u1ea9y t\u1eeb n\u01b0\u1edbc v\u1eabn \u0111\u1ee7 m\u1ea1nh \u0111\u1ec3 \u201cn\u00e2ng\u201d c\u1ea3 con t\u00e0u kh\u1ed5ng l\u1ed3 tr\u00ean m\u1eb7t bi\u1ec3n.<\/span><\/p>\n Thanks to a clear understanding of Archimedes\u2019 principle, humans have designed ship hulls to be wide and hollow so that the water can generate a large buoyant force. Even when a ship carries hundreds of containers or thousands of passengers, the upward push from the water is still strong enough to \u201clift\u201d the entire giant vessel and keep it afloat on the sea.<\/span><\/p>\n C\u00f3 g\u00ec th\u00fa v\u1ecb khi t\u00e0u n\u1ed5i tr\u00ean n\u01b0\u1edbc?<\/b> Khi t\u00e0u n\u1ed5i, n\u00f3 di chuy\u1ec3n d\u1ec5 d\u00e0ng tr\u00ean bi\u1ec3n, gi\u00fap v\u1eadn chuy\u1ec3n h\u00e0ng h\u00f3a, du l\u1ecbch v\u00e0 kh\u00e1m ph\u00e1 \u0111\u1ea1i d\u01b0\u01a1ng. Nh\u1edd l\u1ef1c \u0111\u1ea9y Acsimet m\u00e0 con ng\u01b0\u1eddi c\u00f3 th\u1ec3 ch\u1ebf t\u1ea1o t\u1eeb thuy\u1ec1n nh\u1ecf \u0111\u1ebfn t\u00e0u du l\u1ecbch, t\u00e0u ng\u1ea7m hay th\u1eadm ch\u00ed l\u00e0 nh\u1eefng con t\u00e0u ch\u1edf d\u1ea7u n\u1eb7ng h\u01a1n c\u1ea3 m\u1ed9t th\u00e0nh ph\u1ed1!<\/span><\/p>\n When a ship floats, it can move easily across the ocean, allowing people to transport goods, travel, and explore the seas. Thanks to Archimedes\u2019 buoyant force, humans can build everything from small boats to cruise ships, submarines, and even massive oil tankers that are heavier than an entire city!<\/span><\/p>\n
\n<\/b>What is Archimedes\u2019 buoyant force?<\/b><\/p>\n![\"\"](\"https:\/\/i-clc.edu.vn\/wp-content\/uploads\/2025\/12\/1-1.png\")
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\n<\/b>Why do huge ships float but small rocks sink?<\/b><\/p>\n<\/a><\/p>\n
\n<\/b>How does this work in real life?<\/b><\/p>\n
\n<\/b>What\u2019s special about ships floating?<\/b><\/p>\n