law of conservation of energy

Question 1 Define the law of conservation of energy?

Law of conservation of energy
Whenever energy gets transformed,the total energy remains unchanged.

According to this law,energy can only be converted from one form to another,it can neither be created or destroyed.The total energy before and after transformation remains same.

Ball,mass,m,height,h,above the ground
Potential energy =mgh
As ball falls,its potential energy will change into kinetic energy.

As the ball continues to fall,the potential energy would decrease while its kinetic energy will increase.
When the object is about to reach the ground,h=0 and v will be highest.
Therefore the kinetic energy would be largest and potential energy will be least.

Potential energy+ Kinetic energy = constant
The energy of a freely falling ball is conserved.