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A pulley of radius 2 m is rotated about ...

A pulley of radius 2 m is rotated about its axis by a force `F=(20t -5t^(2))` newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is `10kg m^(2)` the number of rotations made by the pulley before its direction of motion is reversed, is

A

Less than 3

B

More than 3 but less than 6

C

More than 6 less than 9

D

More than 9

Text Solution

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The correct Answer is:
B
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