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A ball of mass m, moving with a velocity u, along X-axis, strikes another ball of mass 2 m kept at rest. The first ball comes to rest after collision and the other breaks into two equal pieces. One of the pieces starts moving along the y-axis with a speed V. The velocity of the other piece is
detailed solution
Correct option is D
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A steel ball is released from a height of 27 m onto a fixed horizontal steel plate. On bouncing the ball rises to a height of 3 m. Then co-efficient of restitution is
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