Momentum+and+Newton's+Third+law+of+Motion

Newton's LawsNewton's third law of motion states Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first. For example, if you are playing pool, and one ball hits another, the first ball will stop because the second exerted an opposite force on the first. However, the second ball also starts moving. This is because of a transfer of momentum from the first to the second. Momentum is a property of a moving object that varies depending on mass and velocity.