A) zero
B) \[2\,gH\]
C) \[mgH\]
D) \[\sqrt{2\,g\,H}\]
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 \[{{v}^{2}}=0+2g\,H\] or \[v=\sqrt{2gH}\]
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