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Object fallen down on Earth from 10 m he...

Object fallen down on Earth from 10 m height lost 20% energy, then it will gain …... height.

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Verified by Experts

The correct Answer is:
8 m
20% is lost means 80% is gained
`:. U_2=80%" of "U_1=U_1xx80/100=0.8U_1`
From law of conservation of energy,
`U_1=0.8U_1`
`:. mgh_2=0.8xxmgh_1`
`:. h_2=0.8h_1=0.8xx10=8m`
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