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In the arrangement shown in Fig. the bal...

In the arrangement shown in Fig. the ball and the block have the same mass `m=1 kg` each, `theta=60^(@)` and length `l = 2.50m`. Coefficient of friction between the block and the floor is `0.5`. When the ball is released from the position shown in Fig. it collides with the block and the block stops after moving a distance `2.50 m`.

The coefficient of restitution for collision between the ball and the block is

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