Answer :

Given:


A hollow sphere is released from a top of an inclined plane of inclination θ.


To prevent sliding, the body will make only perfect rolling. In this condition,



And torque about the center




Putting the value of f in first equation







B) for kinetic energy of the ball






As we know, ω=αt


Kinetic energy=



Substituting the value of α, t, I and s


Kinetic energy=


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