A rubber ball is released from a height of \( 5 \mathrm{~m} \) above the floor. It bounces back repeatedly, always rising to \( \frac{81}{100} \) of the height through which it falls. Find the average speed of the ball. (Take \( \mathrm{g}=10 \mathrm{~ms}^{-2} \) )

[JEE Main 2021, 17 Mar (Shift 2)]

Question

A rubber ball is released from a height of \( 5 \mathrm{~m} \) above the floor. It bounces back repeatedly, always rising to \( \frac{81}{100} \) of the height through which it falls. Find the average speed of the ball. (Take \( \mathrm{g}=10 \mathrm{~ms}^{-2} \) )

[JEE Main 2021, 17 Mar (Shift 2)]

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