Physics · 2021
JEE Main · 17 March 2021, Shift 2 · Q10
A rubber ball is released from a height of 5 m above the floor. It bounces back repeatedly, always rising to 81/100 of the height through which it…
A rubber ball is released from a height of $\displaystyle 5$ m above the floor. It bounces back repeatedly, always rising to $\displaystyle \frac{81}{100}$ of the height through which it falls. Find the average speed of the ball.
(Take $\displaystyle g=10 \mathrm{~ms}^{-2}$ )
Official answer
(2)
$\displaystyle 2.50 \mathrm{~ms}^{-1}$
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.