Homework Help: PHYICAL

Posted by alex on Sunday, July 8, 2012 at 11:15am.

Awoman of 75kg skis down a 50m high hill , the frictional force is not negligible her speed at the bottom of the hill is only 25m\sec, What is the work done by the frictional forces.

PHYICAL - Elena, Sunday, July 8, 2012 at 4:26pm
PE=KE+W(fr)
W(fr)=PE-KE=mgh-mv²/2

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