Newton's Laws and Motion Equations
Newton's equations of motion might look scary, but they're incredibly useful. You've got four main equations, but honestly, v² = u² + 2as is the one you'll use most - it connects initial velocity (u), final velocity (v), acceleration (a), and distance (s).
Here's the magic: if something starts from rest, u = 0. If something stops, v = 0. If gravity is the only force, a = 9.8 m/s² or10m/s2tomakecalculationseasier.
Newton's first law is about inertia - objects resist changes to their motion. Newton's second law gives us F = ma, connecting force, mass, and acceleration. This is probably the most important equation in mechanics.
Newton's third law states that every action has an equal and opposite reaction. When you walk, you push backwards on the ground, and it pushes forwards on you - that's what moves you forward!
Study Hack: For motion equations, always write down what you know and what you need to find - then pick the right equation!