Forces in Physics: Gravitational and Electromagnetic Interactions

This lecture covers the fundamental forces in physics, focusing on gravitational and electromagnetic interactions. It explains the attractive force between masses, the universal gravitational constant, Coulomb's force, and the Lorentz force. The lecture also discusses gravitational waves, the graviton particle, and the forces of deformation. Additionally, it explores friction forces, including static and kinetic friction, and the coefficients of friction for various surfaces. The concept of viscous friction is introduced, detailing its dependence on velocity and fluid viscosity. The lecture concludes with a discussion on Hooke's law and the force of a spring's recoil.