Question

Running up the stairs, Emily was able to lift her 80 kg body a total of 5 m in approximately 3.5

seconds. Determine her power.

Answer 1

P = W / t work/time

W(ork) = m g h = 80kg * 9.8 m.s^2 * 5 m = 3920 N-m

P = 3920 N-m / 3.5 s = 1120 Watts