Motion and Forces
Energy & Machines
100

Formula for speed.

Speed = distance ÷ time


100

The two basic kinds of energy.

Kinetic and potential


200

Speed with direction.

Velocity


200

Formula for work.

W = F × d


300

Rate of change of velocity.

Acceleration

300

Rate of doing work.

Power


400

Force that opposes motion between surfaces.

Friction


400

Six types of simple machines (name one).

Lever / Pulley / Wheel & Axle / Inclined Plane / Wedge / Screw


500

Newton’s law: every action has an equal and opposite reaction.

Newton’s Third Law

500

Energy cannot be created or destroyed.

Law of Conservation of Energy

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