An 80-kg man standing on a frozen lake tosses a 0.500-kg football to his dog. The ball leaves his hands at 15 m/s relative to Earth. What minimum source energy did the man supply? His 20-kg dog, standing still, catches the ball and slides with it. How much energy is dissipated in the catch?
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An 80-kg man standing on a frozen lake tosses a 0.500-kg football to his dog. The ball leaves his ha...
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