Give two examples where you think friction is useful.
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Friction can be a useful force because it prevents our shoes slipping on the pavement when we walk and stops car tyres skidding on the road. When you walk, friction is caused between the tread on shoes and the ground. This friction acts to grip the ground and prevent sliding. Sometimes we want to reduce friction.
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If there was no Friction then we would not be able to stop walking and keep on going...the only way to stop is to crash onto something
If there was no friction then we would not be able to Stop a car after we started it...
It is very obvious when you think what will happen if friction is not there that thinking about what if friction is there(If that makes any sense)
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