NEET | 2017Circular MotionHard

Question

A rope is wound around a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of 30 N ?

Options

A.

0.25 rad/s2

B.

25 rad/s2

C.

5 m/s2

D.

25 m/s2

Solution

τ = Iα
RF = mR2α

α=FmR=303×40100=25 rad/s2

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