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QUESTION
A ball of mass 0.540 kg moving east (+x direction) with a speed of 3.30 m/s collides head-on with a 0.640 kg ball at rest.
A ball of mass 0.540 kg moving east (+x direction) with a speed of 3.30 m/s collides head-on with a 0.640 kg ball at rest. If the collision is perfectly elastic, what will be the speed and direction of each ball after the collision?
