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Two balls with masses of of 2.1 kg and 6.5 kg travel toward each other at...

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Two balls with masses of of 2.1 kg and 6.5 kg travel toward each other at speeds of 10 m/s and 4.0 m/s, respectively. If the balls have a head-on inelastic collision and the 2.1-kilogram ball recoils with a speed of 8.00 m/s, how much kinetic energy is lost in the collision?


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