What is friction? Why is friction necessary
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Explanation:
Friction is a resistance that one substance or object encounters when moving over another.
It is necessary because without friction many essential process cannot be done.
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Advantage
... We can hold a pencil due to friction
... A match when rub on a wall, lit. Due to friction.
... You can walk on road due to friction
But it has some disadvantages too
So we can say that friction is a 'Frenemy'.
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