Friction - A force that slows things down when they rub against each other, Energy - The ability to make things happen or change, inertia - The tendency of things to keep doing what they're doing, Non-Contact Force - A force that acts on things without touching them, Power - How quickly work is done, Acceleration - How quickly something speeds up, slows down, or turns, Contact Force - A force that happens when things touch, Kinetic Energy - The energy of movement, Mass - How much stuff something is made of, Speed - How fast something moves, Gravity - The force that pulls things towards the Earth,

Teaching physics

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