Question

1. If a man of mass 50Kg takes 60s to climb up 20 Steps, Each of height 15 cm, calculate his power?
2. If a water pump is taking 1000Kg of water to a height of 15 m in 200s, find its power?
pls help

Answer 1

Power = Work/Time

Work done here = Energy spent

Energy = Potential Energy(mgh)

Acceleration due to gravity is taken as 10m/s^2

Work done = 50kg x 10m/s^2 x 0.15m

= 75joules

Power = 75/60 = 1.25watts

Use the same explanation as above and calculate 2 questions