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An ice-skater A has a mass of 90 kg and is skating with a velocity of 4.5 m/s when he collides head-on with skater B,

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An ice-skater A has a mass of 90 kg and is skating with a velocity of 4.5 m/s when he collides head-on with skater B, who has a mass of 100 kg and is traveling in the opposite direction at -5 m/s. After the collision, skater B comes to a rest. What happens to skater A and why

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