Question

define upthrust. what is mean by the term buoyancy ? write the application of archemedes principle
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Answer 1

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When we go swimming, we feel a little weightless in the water. The reason for this is that liquids exert an upward force to objects submerged in them. This is known as thrust and is a consequence of the difference in pressure a liquid exerts at different heights.

Archimedes' principle states that when a body is immersed fully or partially in a fluid, it experiences an upward thrust equal to the weight of the fluid displaced by it. The applications of Archimedes' principle are: ... (ii) Lactometers based on Archimedes' principle are used to measure purity of a sample of milk.

Archimedes' principle, physical law of buoyancy, discovered by the ancient Greek mathematician and inventor Archimedes, stating that any body completely or partially submerged in a fluid (gas or liquid) at rest is acted upon by an upward, or buoyant, force, the magnitude of which is equal to the weight of the fluid .

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