Problem 11: A jogger withmass m = 85 kg uses energy at a rateof P = 582 W when she jogs onhorizontal ground at a constant speedof s = 2.4 m/s. The efficiency of her“human engine” however, is e = 0.25. (Inother words, the power used for locomotionis e = 0.25 times the totalpower.)
Part (a) Write an expression for therate of energy expenditure when she jogs at the same constant speedup a slope of φ = 5.24 degrees. Assumewhatever frictional or drag forces are the same in each case. Youranswer should be in terms of the symbols given in the problemstatement and g (9.80m/s2). P =
Part (b) What is the rate of energyexpenditure when she jogs up the slope, in watts?
P =___________ W
Problem 11: A jogger with mass m = 85 kg uses energy at a rate of P = 582 W when she jogs on horizontal ground at a co
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