Question

state law of conservation of energy with the help of an example

Answer 1

Law of conservation of energy states - Energy is neither be created nor be destroyed. It can only be transform in one form of energy to another form. The total amount of energy in the universe remains constant.

In the case of freely falling body - The force acts on freely falling body is acceleration due to gravity and equal to mg i.e. mass * gravity. Hence it is converted from gravity energy to potential energy by position or configuration …  I hope it helps…

Answer 2

according to this principle the total sum of energy of all kinds in an isolated system remains constant at all times. This means that energy can neither be created nor be destroyed. Energy can be changed only from one form to another form of energy.the total energy remains constant.