A radio set of 60 watts runs for 50 hours.How many 'units ' (kWh) of electrical energy is consumed ?

An object of mass 12 kg is at a certain height above the ground. If the potential energy of the object is 480 J,find the height at which the object is with respect to the ground. Given g = 10 ms^-2

1 hp is equal to

The energy possessed by a body due to its motion is called

A force of 7N acts on an object. The displacement is 8m in the direction of force. What is the work done?

Find the energy possessed by an object of mass 10 kg when it is at a height of 6 m above the ground.Given,g = 9.8 m / s²

The energy used in households, industries and commercial establishments are usually expressed in

Two girls, each of weight 400 N climb up a rope through a height of 8m. We name one of the girls as A and the other  as B. Girl A takes 20s while B takes 50s to accomplish this task. What is the power expended by each girl ?

A boy of mass 50 kg runs up staircase of 45 steps in 9 s. If the height of each step is 15 cm, find his power. Take g = 10 m s^-1

A compressed spring possesses