Newton’s First Law of Motion also known as Law of Inertia states that every object persists to stay in uniform motion in a straight line or in the state of rest unless an external force acts upon it.

Newton’s Second Law of Motion states that force is equal to the change in momentum per change in time. For a constant mass, force equals mass times acceleration, i.e. F = m*a. Learn about the Acceleration in detail here.

Newton’s Third Law of Motion states that for every action there is an equal and opposite reaction.

Newton'sfirst lawstates that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition ofinertia.Thesecond lawexplains how the velocity of an object changes when it is subjected to an external force. The law defines aforceto be equal to change inmomentum(mass times velocity) per change in time. Newton alsoThethird lawstates that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal force on object A