Lecture
This lecture covers the principles of ballistics and equilibrium of forces, focusing on scenarios such as crossing a river with a boat, projectile motion without friction, and the application of Newton's laws. The instructor emphasizes the importance of understanding the problem statement, identifying known quantities, and selecting appropriate laws of physics. The lecture also delves into force diagrams, force models, and the integration of equations of motion to determine trajectories. Examples include an athlete launching a weight and calculating the distance and time of impact. The trajectory of a projectile without friction is analyzed, highlighting the importance of choosing the right coordinate system. Practical applications and problem-solving strategies are discussed in detail.