Newton's Laws and Forces notes

Grade 12 Newton's Laws sit on Grade 10 motion and Grade 11 vectors. This section is the prior knowledge the exam guidelines assume: scalars and vectors, resultants, components, velocity…

Grade 12 Newton's Laws start by naming the forces. This section is the kinds the guidelines list: weight, normal force, frictional force, applied force (push or pull), and tension (strings or…

This section is how you draw the forces and how you add them. The exam guidelines want four skills: force diagrams, free-body diagrams, resolving two-dimensional forces (weight on an inclined…

This section is Newton's first law of motion: the law of inertia. The exam wants the official statement, inertia as the property that matches the law, equilibrium as net force zero (rest or constant…

This section is Newton's second law of motion: **$F_{\mathrm{net}}=ma$. The exam wants the official statement, force or free-body diagrams of objects that are in equilibrium or accelerating, and applying the law…

This section is Newton's third law of motion. The exam wants the official statement (the word SIMULTANEOUSLY is not optional), the properties of action-reaction pairs, and identifying those pairs…

This section is Newton's law of universal gravitation, mass, weight, and weightlessness. The exam wants the official statement, $F=Gm_1m_2/r^2$ with **$r$ centre-to-centre, the inverse-square** rule, $w=mg$…

The study of forces and motion forms the foundation of classical mechanics. Understanding how forces interact with objects allows you to predict and explain the motion of everything from projectiles…