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l9. TrolleyXof mass 2 kg moves at constant velocity of3 m 5'1 towards the right and trolley Y or mass 1.5 kg moves at a

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l9. TrolleyXof mass 2 kg moves at constant velocity of3 m 5'1 towards the right and trolley Y or mass 1.5 kg moves at a constant velocity v towards the left on a smooth horizontal track. The trolleys stop after colliding with each other. Find v. A. 0.857 m s" B. 2.25 m sl C. 3 m s" D. 4ms']

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