Lecture
This lecture covers the analysis of an elastic collision model involving a cart with a spring hitting a fixed wall, determining the contact time, maximum compression, and maximum force. It also explores the conservation of mechanical energy, momentum before and after the collision, and the application of Newton's second law. Additionally, it delves into the elastic collision of two balls on the ground, calculating the velocity ratios after the rebound. The lecture concludes with a discussion on central motion, geostationary satellites, and escape velocity.