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A 2 kg mass moving to the right makes an elastic head-on collision with a...

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A 2 kg mass moving to the right makes an elastic head-on collision with a 4 kg mass moving to the left at 4 m/s. The 2 kg mass reverses direction after the collision and moves at 3 m/s. The 4 kg mass moves to the left at 1 m/s. What was the initial velocity of the 2 kg mass?A. 1 m/s to the leftB. 3 m/s to the rightC. 4 m/s to the rightD. 4 m/s to the left

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