A) zero
B) \[2\,\,gH\]
C) mgH
D) \[\sqrt{2\,\,gH}\]
Correct Answer: D
Solution :
At B, the velocity is maximum. Taking vertical downward motion of body from A to B, we have, \[u=0,a=g,s=H\]and v = ? As\[{{v}^{2}}={{u}^{2}}+2\]as; so\[{{v}^{2}}=0+2gH\]or\[v=\sqrt{2gH}\]
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