February 25, 2017

Homework Help: Physics

Posted by Anonymous on Tuesday, September 27, 2011 at 7:01pm.

A 70.0-kg runner has a speed of 5.90 m/s at one instant during a long-distance event.What is the runner's kinetic energy at this instant? If he doubles his speed to reach the finish line, by what factor does his kinetic energy change?

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