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3. Two balls collided on a smooth horizontal surface. Assume the collision is elastic, please find...

3. Two balls collided on a smooth horizontal surface. Assume the collision is elastic, please find the velocities after collision. We know the mass of ball 1 is 5.0 kg, ball 2 is 1.0kg. Before collision ball 1 is at rest and ball 2 has a velocity of 3.0m/s.
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