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A point mass $M$ is released from rest and slides down a spherical bowl (of radius $R$) from a height $H$ as shown in the figure below. The surface of the bowl is smooth (no friction). The velocity of the mass at the bottom of the bowl is

  1. $\sqrt{gH}$
  2. $\sqrt{2gR}$
  3. $\sqrt{2gH}$
  4. $0$
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