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A 3.0 kg object moving at 8.0 m/s in the positive direction of an x axis has a 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 6.0 m/s in the positive direction of the axis. What is
mass M?
3,0 kg
2,0 kg
5,0 kg
4,0 kg
1,0 kg

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