## NEWTON LAWS OF MOTION

Newton’s first law (law of inertia) This law states that “A body continues in its state of rest or uniform motion unless an unbalanced force acts on it”. The mass of a body is a measure of its inertia. Inertia is the property that keeps an object in its state of motion and resists any efforts to change it. Newton’s second law (law of momentum) Momentum of a body is defined as the product of its mass and its velocity. Momentum ‘p’=mv. The SI unit for momentum is kgm/s or Ns. The Newton’s second law states that “The rate of change of momentum of a body is proportional to the applied force and takes place in the direction in which the force acts” Change in momentum= mv-mu Rate of change of momentum= mv-mu/∆t Generally the second law gives rise to the equation of force F=ma Hence F=mv-mu/∆t and F∆t=mv-mu… Read More »NEWTON LAWS OF MOTION