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(chatquestion)...A small block A of mass 1 kg is placed on a long block B of mass 4 kg, another block C of mass 2 kg is approaching the block B with a velocity 10 m/s, collides the block B. the coefficient of restitution of the collision is e coefficient of friction between the blocks A, B is =05and no friction at all the other contacts. The final velocity of the block A will be : 30 m/s 20 m/s A) C) 5 m/s D) 4 m/s

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