Lecture
This lecture introduces the concepts of Newton's logic and changes in vectorial velocity, using the example of a ball performing a loop. It also demonstrates an experiment showing that the projection of uniform circular motion results in harmonic oscillation. The instructor explains the conditions for the ball to stay on the track during the loop and the forces acting on it, emphasizing the critical point at the top of the loop. A visual experiment with a ball moving in a circular path and its projection on a wall, along with a pendulum, illustrates the relationship between circular motion and harmonic oscillation. The lecture concludes by highlighting the similarity between the motion of a point on a circle and harmonic oscillation.