1)Give three examples where friction is useful. 2)How can you reduce friction?
Answers
Answer:
1) Walking –We can walk only if we apply frictional force. ...
Writing – A frictional force is created when the tip of the pen comes in contact with the surface of the paper. ...
Skating – A thin film of water under the blade is necessary to make the skate slide
2) Make the surfaces little more smoother. ...
Lubrication is another way to make a surface smoother. ...
Make the object more streamlined. ...
Reduce the Normal force acting between the surfaces in contact. ...
Reduce the contact between the surfaces, so that less number of bonds will be formed.
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Answer:
Answer
1. Writing: If there were no friction, you couldn't write.
Walking: You are able to walk due to friction, you push the floor backward and floor in turn push you forward.
Taking a circular turn on a plane curved road: Friction acts as a centripetal force which is required to take a circular turn.
2. Methods for Reduction friction:
Make the surfaces little more smoother. ...
Lubrication is another way to make a surface smoother. ...
Make the object more streamlined. ...
Reduce the Normal force acting between the surfaces in contact. ...
Reduce the contact between the surfaces, so that less number of bonds will be formed.
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