1.

A mass m slips along the wall of a semispherical surface of radius R. The velocity at the bottom of the surface is              [MP PMT 1993]                    

A.             \[\sqrt{Rg}\]
B.             \[\sqrt{2Rg}\]
C.             \[2\sqrt{\pi Rg}\]
D.             \[\sqrt{\pi Rg}\]
Answer» C.             \[2\sqrt{\pi Rg}\]


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