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August 30, 2014

August 30, 2014

Posted by **Darcie** on Thursday, February 23, 2012 at 8:48pm.

(a) What is the runner's kinetic energy at this instant?

KEi = J

(b) If he doubles his speed to reach the finish line, by what factor does his kinetic energy change?

KEf

KEi

=

- physics -
**bobpursley**, Thursday, February 23, 2012 at 8:50pmKE= 1/2 m v^2

what happens of you double v?

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