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A 20-kg object sitting at rest is struck elastically in a head-on collision with a 10-kg object initially moving at +3.0 m/s. find the final velocity of the 20 kg object after the collision.

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A 20-kg object sitting at rest is struck elastically in a head-on collision with a 10-kg object  Find thefinal velocity of the 20-kg object after the collision. is struck elastically in a head-on collision with a10-kg object initially moving at +3.0 m/s.

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