A 60 kg person utilizes energy at 0.25 horsepower while running up the stairs of a building. Each step is 20 cm highly. How much work does the person do in one minute?
F = M*g = 60 * 9.8 = 588 N. = Wt. of the person.
0.25hp * 746w/hp = 186.5 Watts. = 186.5 J./s.
Work = 186.5J/s * 60s = 11,190 J.