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how can we define work ,energy and power in terms of physics
Work is said to be the physical activity involving a force and movement in the direction of force and an equal amount of energy is used up when work is being done.

Power is defined as the rate of doing work.We can obtain power by dividing the work done by time taken for doing the work.That is,

Power = Work done/Time taken

or P = W/t
where P = power
          W = work done
     and t = time taken
Power is also defined as the rate at which energy is consumed (or utilized). We can also obtain power by dividing 'energy consumed' by 'Time taken' for consuming energy.That is,
Power = Energy consumed / Time taken
or P = E/T
Power is a scalar quantity which has only magnitude but no direction.

Energy is defined as"the capacity of a person to do work.Similarly in physics,energy is measured by the amount of work that an object can do.
Thus the capacity of an object to do work determines the amount of work it has.This energy can be due to its state of motion,position or its configuration.An object when raised to a certain height or made to move possesses a certain amount of energy.


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