First slide

Collisions

Question

A tennis ball is released from height h above ground level. If the ball makes inelastic collision with the ground, to what height will it rise after third collision

Moderate

A

he⁶
B

e²h
C

e³h
D

None of these

Solution

$h_{n} = {he}^{2 n}$ after third collision $h_{3} = {he}^{6}$ [as n = 3]

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