(Answered) A 60 kg object moving at 160 ms in the positive direction

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A 6.0 kg object moving at 16.0 m/s in the positive direction of an x axis has one-dimensional elastic collision with an object of mass M, initially at rest. After the collision the object of mass M has a velocity of 8.0 m/s in the positive direction of the x axis. What is mass M

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