Q. 77

A solid sphere of mass m is released from rest from the rim of a hemispherical cup so that it rolls along the surface. If the rim of the hemisphere is kept horizontal, find the normal force exerted by the cup on the ball when the ball reaches the bottom of the cup.

Answer :

Given:


Mass of the sphere= m


From the figure,



Total normal force can be written as







Therefore, total normal force is equal to




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