Question

A body falls freely under gravity. Its velocity is v when it
has lost potential energy equal to U. What is the mass of
the body ?
(a) U²/v² (b) 2U²/v²
(c) 2U/v² (d) U /v²

Answer 1

Answer:

(a) U²/v²

Explanation:

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Answer 2

Question:-

A body falls freely under gravity. Its velocity is v when it

has lost potential energy equal to U. What is the mass of

the body ?

(a) U²/v² (b) 2U²/v²

(c) 2U/v² (d) U /v²

${\red{\underline{\underline{\bold{Answer:-}}}}}$

By conservation of Energy principle.

U=1/2 mv²

∴ m= 2u/v²

The principle of conservation of energy states that the total amount of energy remains the same in such conversions, i.e. energy cannot be created or destroyed. In mechanics, the potential energy possessed by a body is frequently converted into kinetic energy, and vice versa.

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