Explain the difference between energy and powerand how

they are related to work. Give examples ofeach.

Power:Power can be defined as the time rate at which work is done or

or power is defined as the time rate of transfer of energy

Example of power: (i) When a pump lift a mass of water through a vertical height in a give period of time.

(Ii) Power is developed when a car traveling at a constant speed, over comes a constant frictional resistance.

While

Work: Work is said to be done whenever a force moves a body through a certain distance in the direction of force, and is equal to the product of force and the distance moved.

Examples of Work: (i) Work is done when a lump of stone is drag through a certain distance.

(ii) Work is done when a mass of stone falls from a height.