Angular Momentum and Gravitational Force

This lecture covers the concepts of angular momentum, gravitational force, and orbital motion. Starting with the definition of angular momentum and its calculation, the lecture explains the theorem of angular momentum and its application in curvilinear motion. Moving on to gravitational force, the lecture discusses the historical observations by Tycho Brahe and Johannes Kepler, leading to Kepler's laws. It then delves into Newton's explanation of Kepler's laws and the universal law of gravitation. The lecture concludes with the concept of orbital motion, Kepler's third law, and the calculation of orbital period and velocity.