Newton’s second law states that the rate of change of momentum of a body is directly proportional to the force applied, and this change in momentum takes place in the direction of the applied force. Newton’s first law gives the law of inertia and third law the action & reaction law. Law of conservation of momentum states that initial momentum is equal to final momentum.

Rate of change of momentum = force applied
Force
Force = k where k = proportionality constant

Force = kma where a = acceleration =