Power is the rate at which energy is supplied or gained by a system of body/bodies. Power of a system can be expressed in two ways
Average Power
Instantaneous Power.
Average Power: It is defined for a given period of time as the ratio of total work done by a system to
the total time taken in doing the work. For a rigid body the work done will be change in its kinetic energy
and for a conservative force field it is equal to its change in potential energy as we already discussed
earlier.
Instantaneous Power: It is the rate at which energy is supplied or gained at an instant of time in the
process of energy transfer. Mathematically it can be expressed as time derivative of work done or that
of kinetic energy in case of a rigid body.
Lets understand the Concept of Power and its calculation through the video
https://youtu.be/WUou1gkDppc
To understand the application of Power in different physical situations, follow the Example Videos given
below –