Give examples to show that friction is both a friend and a foe.
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Examples to show that friction is a friend and a foe: Friction is friend:
(i) Friction allows us to grip and catch different objects.
(ii) It helps us to walk comfortably on the surface. ...
Friction is foe:
(i) Friction causes wear and tear in objects.
(ii) It causes damage to the parts of machines.
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Examples of friction as a foe:
- Wear and tear of soles of our shoes is due to friction.
- When a tyre deflates, it is difficult to move the vehicle because of increased friction between the tyre and the road surface.
- Machines get heated up and produce noise because of friction.
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