give any three examples when is friction useful
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Explanation:
Helpful frictional forces
Friction can be useful. For example:
1)friction between our shoes and the floor stop us from slipping
2)friction between tyres and the road stop cars from skidding
3)friction between the brakes and wheel help bikes and cars to slow down
Frictional forces are much smaller on smooth surfaces than on rough surfaces, which is why we slide on ice but not on concrete.
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