A small glass marble of mass ‘m’ oscillates between the two edges, inside a hemispherical glass bowl of radius ‘r’.If ‘V’ is the speed of marble at the lowest position, the normal reaction at that position is

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answer is D.

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Detailed Solution

Conserving energy between A and B, At B, N - mg = centripetal force = mv2/r N = mg + 2mg = 3mg = 3mv2/2r

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