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A solid cylinder of mass 50 kg and radiu...

A solid cylinder of mass `50 kg` and radius `0.5 m` is free to rotate about the horizontal axis. A massless string is wound round the cylinder with one end attached to it and other end hanging freely. Tension in the string required to produce an angular acceleration of `2` revolution `s^(-2)` is

A

25N

B

50N

C

78.5N

D

157N

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The correct Answer is:
D
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