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A 2.3-kg object traveling at 6.1 m/s collides head-on with a 3.5-kg object traveling in the...

A 2.3-kg object traveling at 6.1 m/s collides head-on with a 3.5-kg object traveling in the opposite direction at 4.8 m/s. If the collision is perfectly elastic, what is the final speed of the 2.3-kg object?

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