A) 10 m
B) 8 m
C) 4m
D) 6m
Correct Answer: D
Solution :
\[mg{{h}_{2}}=mg{{h}_{1}}\times \frac{60}{100}\] Since ball losses \[40%\] of its energy, therefore it is left with \[60%\] of energy \[{{h}_{2}}={{h}_{1}}\times \frac{60}{100}=\frac{10\times 60}{100}m=\mathbf{6}\,\,\mathbf{m}\]You need to login to perform this action.
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