Lecture
This lecture explores the concept of central forces, focusing on the conservation of angular momentum and the law of areas. The instructor demonstrates experiments with a rotating table to illustrate the principles of central forces and conic sections. By analyzing the parametric equations of conic sections, the lecture shows how the acceleration in central force motion is inversely proportional to the square of the distance. The discussion extends to the gravitational and electrostatic forces, highlighting the relationship between the force law and the resulting trajectories. Through mathematical derivations and physical demonstrations, the lecture connects the properties of conic sections to the nature of the forces acting on objects, providing insights into the dynamics of celestial bodies and mechanical systems.