A) 2
B) 0.5
C) 1
D) 0.9
Correct Answer: D
Solution :
Using the relation for \[e=\sqrt{\frac{0.81{{h}_{1}}}{{{h}_{1}}}}=0.9\] ?(1) where \[{{h}_{2}}\] is the height of rebound and \[{{h}_{1}}\]is the height of fall hence, from equation (1) \[e=\sqrt{\frac{0.81{{h}_{1}}}{{{h}_{1}}}}=0.9\]
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