A 72.7 kg student runs up the stairs of a football stadium to a height of 11.9 m above the ground in 10.1 s.

Question

(a) What is the power of the student in kilowatts?

Answer 1

Fs = m*g = 72.7kg * 9.8N/kg = 712.5 N. =
Force of the student.

P = F * d/t = 712.5 * 11.9/10.1 = 839.4
J./s = 839.4 Watts = 0.8394 Kilowatts.