A ball is released from rest relative to the elevator at a distance \( h_{1}=18 \mathrm{~m} \) a...

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A ball is released from rest relative to the elevator at a distance \( h_{1}=18 \mathrm{~m} \) above the floor. The speed of the elevator at the time of ball release is \( v_{0} \). Determine the bounce height \( h_{2} \) (in \( \mathrm{m} \) ) of the ball. The elevator has an upward acceleration \( a=g / 4 \). The coefficient of restitution for the impact \( e=2 / 3 \).
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