A body falling from a height of 10m rebo...

A body falling from a height of 10m rebounds from hard floor. If it loses 20% energy in the impact, then coefficient of restitution is

0.89

0.56

0.23

0.18

Text Solution

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The correct Answer is:

`h_0 = 10 m , h_1 = 0.8 h_0 = 8m`
`h_1=e^2h_0implies e =sqrt((h_1)/h_0)=sqrt(8/10)`
`sqrt(0.8) = 0.89`

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