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A ball dropped from a height of 2 m rebo...

A ball dropped from a height of 2 m rebounds to a height of 1.5 m after hitting the ground. Then the percentage of energy lost is

A

25

B

30

C

50

D

100

Text Solution

Verified by Experts

The correct Answer is:
A
Initial energy `=U_i = mgh`
Final energy `=U_f = mgh `
% energy loss `= (mg(h-h.))/(mgh) xx100 = (0.5)/2 xx100 = 25%`
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