1.

A body (intially at rest is falling under gravity. When it loses a gravitational potential energy by `U`, its speed is `v`.The mass of the body shall be `:`A. `(2U)/(v)`B. `(U)/(2v)`C. `(2U)/(v^(2))`D. `(U)/(2v^(2))`

Answer» Correct Answer - C
By COME loss is `PE=`gain in `KE` `:`
`U=(1)/(2)mv^(2)rArrm=(2U)/(v^(2))`


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