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A 63.1 kg runner has a speed of 4.10 m/s at one instant during a long-distance event. HINT (a) What is the runner's kinetic energy

A 63.1 kg runner has a speed of 4.10 m/s at one instant during a long-distance event. HINT (a) What is the runner's kinetic energy at this instant (in J)? 530.35 U (b) How much net work (in ]) is required to triple his speed? 1591.06 X J

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