UNIVERSITY PHYSICS I CHAPTER 9 Impulse, Momentum and Collision 99.1 Momentum and Newton's second law of motion Collisions: All around us(cars, buses) Grand astronomical scale (stars, galexies) Nuclear, atomic and molecular physics The impulse-momentum theorem relates the change in the momentum of a system to the total force on it and the time interval during which this total forces acts.1 Collisions: All around us (cars, buses) Grand astronomical scale (stars, galexies) Nuclear, atomic and molecular physics The impulse-momentum theorem relates the change in the momentum of a system to the total force on it and the time interval during which this total forces acts. §9.1 Momentum and Newton’s second law of motion