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 hanging freely. Tension in the string required to produce an angular acceleratrion of 2 revolutions `s^-2` is

`25 N`

`50 N`

`78.5 N`

`157 N`

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