Newton’s laws notes

This section is normal force and friction: the contact forces a surface exerts on an object. You must define each force, know how **$N$** ($F_N$) sits perpendicular to the surface, how **$f$** ($F_f$) sits…

This section is Newton's first law of motion: inertia, net force zero, and equilibrium. You must state the law in CAPS words, define inertia, link mass to inertia, and explain seatbelts using the…

This section is Newton's second law of motion for a single object: state the law, use **$F_{\mathrm{net}}=ma$, draw force and free-body diagrams, then solve horizontal, vertical, and inclined-plane problems for…

This section is Newton’s second law applied to two-body systems joined by a light inextensible string, connected masses, tension, Atwood-style setups, and horizontal + hanging pulley systems. It is…

This section is Newton's third law of motion: action–reaction pairs, equal and opposite forces of the same type, acting on different objects. You must state the law in CAPS words, identify Newton…

This section is Newton's law of universal gravitation: the official statement, **$F=\dfrac{Gm_1m_2}{r^2}$, inverse-square ratio reasoning, mass vs weight,$w=mg$, weightlessness, and calculating$g$on Earth or…