PHYS 1A Lecture Notes - Lecture 18: International System Of Units, Elastic Collision, Particle System
Document Summary
If two objects stick, we call that perfectly inelastic collision. An object of mass 1 and speed 1 comes in from the left, and starts a series of elastic collisions. Which of the following best represents the motion of the objects after all collisions have occurred? (# represents velocity) week 8 page 1. In each collision, a ball imparts delta p on wall: week 8 page 2. *because wall moves, delta p decreases with each collision. Solution complicated- see slides appended to end of lecture. A net external force changes the velocity of the system"s center of mass. The center of mass is the balance point of an object. Three particles are placed in the xy plane. Center of mass of a system acts like a point particle acted on by the net external force. This is newton"s 2nd law applied to a system of particles. Circular and rotational motion (kudu chapter 8 on uniform circular motion)
