Question

Calculate the quantity of electrical energy used by an electric bulb rated 60watts used for 2 hours.

Calculate the work done of a 100kg man who jumps from a building 10m high in 10 seconds, given that acceleration due to gravity is 10m/s2.

Calculate the power of a 100kg man who jumps from a building 10m high in 10 seconds, given that acceleration due to gravity, is 10m/s2.

A force of 200N is used to push a wheelbarrow whose handle makes angle 30 with the horizontal over a distance of 50m. Calculate the work done.

Calculate the work done when a person pushes a car from its stationary position to a distance of 50m applying a force of 200N.

Answer 1

Answer:

t=6 hrs              

               P=0.06 kW

Thus energy consumed per day is:

E=Pt=0.06×6=0.36 kWh=0.36 units