The momentum of a body is defined to be the product of its mass m and velocity v, and is denoted by p: [p = m v] Hence, Statement 2 is correct. Momentum is clearly a vector quantity. Hence statement 1 is correct. The rate of change of momentum of a body is directly proportional to the applied force and takes place in the direction in which the force acts.( Newton's Second Law of Motion ) The total momentum of an isolated system of particles is conserved. The law follows from the second and third laws of motion. A large force acting for a short time to produce a finite change in momentum is called an impulsive force . Impulsive force is like any other force – except that it is large and acts for a short time. Impulse = Force × time duration = Change in momentum (the product of force and time , which is the change in momentum of the body remains a measurable quantity. )
