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A ball is dropped from a height of 100 m...

A ball is dropped from a height of 100 m. At the surface of the earth, 20% of its energy is lost. To what height the ball will rise?

A

80 m

B

40 m

C

60 m

D

20 m

Text Solution

Verified by Experts

The correct Answer is:
A
`mgh= (80)/(100) xx mgxx 100 rArr h= 80m`
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