Posted by corey on Thursday, March 1, 2012 at 11:56pm.
A 65.0kg runner has a speed of 5.20 m/s at one instant during a longdistance event. (a) what is the runner's kinetic energy at this instant? (b) if he doubles his speed to reach the finish line, by what factor does his kinetic energy change

physics  drwls, Friday, March 2, 2012 at 5:14am
(a) K.E. (1/2) M V^2 = ___ joules ?
(b) doubling V quadruples the kinetic energy.
You do the numbers.

physics  Anonymous, Thursday, March 29, 2012 at 1:01am
87.88J

Physics  Princess, Monday, October 3, 2016 at 9:53pm
A 65.0kg runner has a speed of 5.20 m/s at one instant during a long distance event (a) What is the runnerâ€™s 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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