FORCES

A force can be a push or a pull. It is not something you can see or touch but you can see it in action.

Forces make things move, stop or change shape.

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Gravity is the force that pulls all objects towardas the centre of the Earth.

Friction is the force that acts between two surfaces that rub against each other. Friction slows down moving objects. There is less fiction on smooth surfaces than on rough surfaces.

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