Question

A man of mass 80 kg climbs a slope with a height of 5m. It takes him 10s to reach the top. a. How much work is done? b. Calculate the man's power

Answer 1

Answer:

Explanation:

if he is moving at a constant velocity, the work changes the potential energy

W = PE = mgh = 80(9.8)(5) = 3,920 J

Power is the rate of doing work

P = W/t = 3920/10 = 392 W(atts)