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A solid cylinder rolls down an inclined ...

A solid cylinder rolls down an inclined plane. Its mass is `2 kg and radius 0.1 m`. It the height of the inclined plane is `4m`, what is its rotational `K.E.` when it reaches foot of the plane ? Assume that the surfaces are smooth. Take `M.I.` of solid cylinder about its axis = `mr^(2)//2`.

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