Law of Conservation of Energy and Potential to Kinetic Energy Conversion

According to law of conservation of energy,

 Energy of an isolated system is constant. It can neither be created nor be destroyed but it can be transformed from one type to another.

 For example, when an object falls on the ground from a certain height, its kinetic energy is converted into other forms of energy such as sound energy, heat energy, light energy, etc.

Newton's Laws of Motion

Newton studied about motion scientifically and concluded some results which are called Newton's laws of motion. There are three laws of motion. All three laws define force in different ways. First law defines force qualitatively, second law defines quantitatively and third law highlights that single and isolated force is not possible.

Newton's First Law of Motion

According to Netwon's first law of motion,