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Power, Force and Velocity

A body is mov...

Question

A body is moved from rest along a straight line by a machine delivering constant power. The velocity of the body as a function of time is proportional to,

A

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B

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C

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D

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Solution

The correct option is B

P = constant

$\frac{K E}{t} = c o n s t a n t \Rightarrow \frac{1}{2} m v^{2} = c o n s t a n t X t \Rightarrow v α \sqrt{t}$

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