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.© BrainMass Inc. brainmass.com December 20, 2018, 12:02 am ad1c9bdddf
It explains the works done by the jogger and by air resistance, respectively.