In the arrangement shown in figure, the ball and the block have the same mass \( m=1 \mathrm{~kg...

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In the arrangement shown in figure, the ball and the block have the same mass \( m=1 \mathrm{~kg} \) each, \( \theta=60^{\circ} \) and length \( l=2.50 \mathrm{~m} \). Coefficient of friction between the block and the floor is \( 0.5 \). When the ball is released from the position shown in figure, it stops after moving a distance \( 2.50 \mathrm{~m} \).
The coefficient of restitution for collision between the ball and the block is
(1) \( 0.50 \)
(2) \( 0.75 \)
(3) \( 1.0 \)
(4) \( 0.30 \)
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