How is the power related to the speed at which a body can be lifted? How many kilograms will a man working at the power of 400 W, be able to lift at constant speed of 1 ms–1 vertically? (g = 10 ms–2)
Power = 400 W
Speed = 1m/s
g = 10 m/s2
Power = mgh/t = mgv
m = power/ g x speed = 400/ (10 x 1) = 40 Kg