Angular Momentum, Torque, and Law of Gravitation

This lecture covers the concepts of angular momentum, torque, and the law of gravitation. Starting with the definition of angular momentum and torque, the instructor explains their relation to rotational motion. The lecture then delves into Kepler's laws, focusing on the first law which describes planetary orbits as ellipses. Moving on to Newton's second law, the lecture explores the gravitational force between celestial bodies and its impact on their motion. The discussion extends to the universal law of gravitation, detailing how masses interact through gravitational forces. The lecture concludes with a practical experiment, the Cavendish balance, used to measure the universal gravitational constant.