Question

desadvantages of friction​

Answer 1

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Oppose motion.

Produce heat in moving parts of machines/engines.

Produce noise in machines /engines.

Makes engines to consume more fuel, in other words it reduces the efficiency of engines.

Cause wear and tear in moving parts of machines/engines.

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Answer 2

Explanation:Friction causes the moving parts in machineries in automobiles to heat up this results in the wastage of energy and fuel friction also causes wear and tear of the moving parts. Depending on the requirements we need to reduce or increase friction between the surfaces