Principles of Motion

Principles of motion is coined by Sir Issac Newton. He explained this principles through his three laws. These laws are the back bone of the science especially physics. Hence this three laws of motion are also known as the fundamental laws in physics. From these three laws, we can realize the relation between displacement, acceleration, force, momentum etc. Principles of motion normally known as the Newton's laws of motion.

Newton's Laws of Motion

1. First Law of Motion

Newton's first law tells about the inertia of an object. Hence the first law is also known as Law of inertia. This law states that a body continues its state of rest or uniform motion until we applied an external force.

2. Second Law of Motion

The second law states that the acceleration produced by a force acting on an object is directly proportional to the force and inversely proportional to the mass of the body. The mathematical expression is given by, 

a = Fm

Where a is the acceleration
           F is the applied force
           m is the mass of the object

Or,

F = ma

3. Third Law of Motion

This law states that, for every action, there is an equal and opposite reaction.