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FORCES (Weight (The units used to measure forces are newtons (N), Your…
FORCES
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Friction
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The tyres of a formula one racing car stop the the car from sliding of the road as it speeds round a sharp bend.
definition of unit
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Example: when you throw a ball, you need to touch the ball in order to put force on it.
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Some forces can affect an object from a distance, these are called non-contact forces.
Forces can change the shape of something, it's speed or the direction it moves in.
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When you go down a steep hill with a bike, the brakes need to touch the wheel to produce friction and slow you down.
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The earth is so big that it's gravity is very strong, and pulls us towards it.
Balanced and unbalanced
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It is hard for one person to pull a car but if a second person helps then the forces are joined making it easier to move.
If one force is stronger than the other, something will start to move, the forces are unbalanced.
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