Classical Mechanics Summary

# Classical Mechanics ## Newton's Three Laws 1. **Inertia**: An object at rest stays at rest; an object in motion stays in motion (unless acted on by a force) 2. **F = ma**: Force equals mass times acceleration 3. **Action-Reaction**: Every action has an equal and opposite reaction ## Equations of Motion (SUVAT) - v = u + at - s = ut + ½at² - v² = u² + 2as Where: s=displacement, u=initial velocity, v=final velocity, a=acceleration, t=time ## Energy - **Kinetic Energy**: KE = ½mv² - **Potential Energy**: PE = mgh - **Conservation**: KE + PE = constant (no friction) ## Work and Power - Work: W = F × d × cos(θ) - Power: P = W/t = F × v