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word done by the jogger and by air resistance

An 80 kg jogger starts from rest and runs up the hill into a stiff breeze. At the top of the hill the joggers body has done a work of 1.8 X 10^4 J, air resistance has done work of 4420J, and the joggers speed is 3.5 m/s.

(1) Is the work done by the joggers body positive or negative? I this work done by a conservative or non-conservative force?

(2) Is the work done by air resistance positive or negative? Is this work done by a conservative or non-conservative force?

Using conservation of energy, determine the height of the hill.

Solution Summary

It explains the works done by the jogger and by air resistance, respectively.

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