A 65.0-kg runner has a speed of 5.20 m/s at one instant
Chapter 5, Problem 5.3.11(choose chapter or problem)
A 65.0-kg runner has a speed of 5.20 m/s at one instant during a long-distance event. (a) What is the runners kinetic energy at this instant? (b) If he doubles his speed to reach the finish line, by what factor does his kinetic energy change?
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