Newton’s First Law of Motion [IB Physics SL/HL]

This video explores Newton's First Law of Motion, also known as the Law of Inertia, which states that an object remains at rest or in uniform motion unless acted upon by an unbalanced force. The video introduces the concept of net force, the vector sum of all forces acting on an object, and translational equilibrium, where forces are balanced and the net force is zero. Free-body diagrams are explained as tools to identify and analyze forces, with examples including objects suspended by springs, falling at terminal velocity, or resting on inclined planes. The video also demonstrates how to apply Newton's First Law to solve sample problems, such as a mass on a frictionless inclined plane held by a spring, and a mass rising at a constant speed in a liquid, emphasizing the importance of vector components and free-body diagrams in analyzing forces and motion.