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Question

A mass m slips along a smooth hemispherical surface of radius R starting from rest at the top as shown.

The velocity of the mass at the bottom of the surface is


  1. Rg

  2. 2Rg

  3. 2πRg

  4. 2πRg


Solution

The correct option is B

2Rg


By applying law of conservation of energy

mgR = 12mv2

v=2Rg

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