Newton’s Law of Motion:
In 1687, Sir Issac Newton in his book ‘Principia’ published three laws of motion related to all the moving objects in the universe. These are known as Newton’s Law of Motion. These laws can’t be proved using any old concept of physics.
Yet their validity has been confirmed through successful explanations and predictions of numerous events in nature. Thus, the laws founded a new branch of physics called kinetics.
Newton’s first law:
Every body continues to be in its state of rest or of uniform motion in a straight line unless the body is compelled to change its state by a net external force.
Newton’s second law:
The rate of change of momentum of a body is directly proportional to the applied force and the change takes place in the direction in which the force acts.
Newton’s third law:
To every action there is an equal and opposite reaction.