Forces are pushes and pulls. Contact forces, non-contact forces, magnets, gravity, simple machines — and how force and energy are related.
Forces that touch — and forces that act at a distance.
What force diagrams tell us about motion.
How forces transfer or transform energy.
Mass, weight and the equation F = mg.
How charges attract, repel — and keep planets moving.
North, south and the rules of magnetic poles.
Invisible force fields you can map with iron filings.
Turn electricity into magnetism — and control its strength.
Use less effort to move bigger loads.
Bringing forces and magnetism together in real-world problems.