Q .     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 `10 kg m^2,` the number of rations made by pulley before its direction of motion if reversed, is :

JEE 2011
A

more than `3` but less than `6`

B

more than `6` but less than `9`

C

more than `9`

D

more than `9`

0
Success Rate: NAN %
Sr. No.SubjectTagCorrectRecorded Answer