U3 L1 Essentials Momentum Quantity of motion an object has. If an object is in motion it has momentum How much stuff is moving and how fast stuff is moving. Mass and velocity. Momentum is directly proportional to mass and velocity The greater the mass and velocity the greater the momentum The product of the average force and the time over which it acts. F x t Impulse - momentum theorem The impulse on an object is equal to the change in momentum. F x Change in T = P2-P1 True. If an object is at rest it has a momentum of zero. Newtons second law describes how the velocity is changed by a force acting on it. a =F/m When determining the new momentum or the new velocity of an object. The change in momentum is equal to the impulse. A large change in momentum occurs only with a large impulse. The total p of a closed, isolated system is constant. The total p before and after the collision is the same. In a collision between two objects, the force on one object is equal to and opposite in direction as the force on the other object. They're both the same Change in momentum is equal to impulse. The object with the least mass.
