What are Newton's laws of motion?

Newton's laws of motion: F = m × a. Things keep doing what they are doing, staying still or moving in a straight line, unless a force pushes or pulls them. Things keep still or keep moving in a straight line unless a force acts (inertia).

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Chapters in this interactive model

1. Three rules for everything that moves: Things keep going, force changes motion, and every push pushes back.
2. Seat belts and piano hammers: Moving things want to keep moving. Stopping them takes a force, and time.
3. F = ma on the road: Speeding up takes a forward push. Turning takes a sideways one.
4. Every push pushes back: Throw water or air one way, and you get pushed the other.
5. Too fast, too small, too spun: Near light speed, inside atoms and in spinning rooms, Newton needs help.