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Two balls with masses of 2.0 kg and 6.0 kg travel toward eachother at speeds of 12 m/s and 4.0 m/s, respectively. If the ballshave a head-on, inelastic collision and the 2.0-kg ball recoilswith a speed of 8.0 m/s, how much kinetic energy is lost in thecollision?

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