A man weighing 500 N carried a load of 100 N up a fighter of stairs 4 m high in 5 seconds. What is the power?
Given, weight of the man = 500N
Weight of the load = 100N
Total weight = 500 + 100 = 600N
Height (vertical distance) = 4m
Work done = total weight x vertical distance
Work done = 600 x 4
Work done = 2400 J
Power = Work done/time
= 2400/ 5
= 480W