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A body rotating at 20rad//s is acted upo...

A body rotating at `20rad//s` is acted upon by a constant torque providing it a deceleration of `2rad//s^(2)`. At what time will the body have kinetic energy same as the initial value if thhe torque continues to act?

A

20 sec

B

40 sec

C

5 sec

D

10 sec

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The correct Answer is:
A
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