A ball is allowed to fall from a height of 10 m. If there is 40% loss of energy due to impact, then after one impact ball will go up to (in m)

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answer is 6.

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Detailed Solution

mgh = initial potential energymgh' = final potential energy after reboundAs 40% energy lost during impact ∴mgh'=60% of mgh ⇒h'=60100×h=60100×10=6 m

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