Question

a hiker wears a 7.5-kg backpack while climbing a mountain. after 30.0 min, the hiker is 8.2 m above the starting point. what is the average amount of power created by the hiker?

Answer 1

Potential Energy = mgh, Mass = 7.5kg, g ≈ 9.8 m/s², h = 8.2 m

PE = 7.5 * 9.8 * 8.2

PE = 602.7 J.

Power = Work done / Time, Time = 30 minutes = 30*60 = 1800 seconds

Power = 602.7 J / 1800s ≈ 0.3348 Watts

Power ≈ 0.3348 Watts