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March 27, 2017

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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 - ,

    PE=KE+W(fr)
    W(fr)=PE-KE=mgh-mv²/2

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