Give examples to show that friction is both a friend and a foe.
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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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Friction is a friend : It helps us to walk comfortably on the surface and allows us to grip and catch objects.
Friction is a foe : Friction causes wear and tear in objects.
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