Question

what is friction? why is it useful?
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Answer 1

Explanation:

• Friction always slows a moving object down. ...
• 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.

Answer 2

Answer:

Friction is force resisting the relative motion of solid surface , fluid layer and material element siblings against each other .

friction can be useful force because it's prevent 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 the shoes and on the ground . this friction acts to grip on the ground and prevent sliding .