A) 6 m/sec
B) 1 m/sec
C) 2 m/sec
D) 8 m/sec
Correct Answer: A
Solution :
If v is velocity of pendulum at Q and 10% energy is lost while moving from P to Q Hence, by applying conservation of between P and Q \[\frac{1}{2}m{{v}^{2}}=0.9\,(mgh)\]Þ\[{{v}^{2}}=2\times 0.9\times 10\times 2\]Þ \[v=6\,m/sec\]You need to login to perform this action.
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