Question

describe three points on disadvantages of friction​

Answer 1

Disadvantages of friction:

Friction produces a lot of heat in various parts of the machinery and this leads to wastage of energy as heat.

Opposes motion, hence more energy is needed to overcome friction.

Noise production in machines is irritating as well as leads to energy loss.

Forest fires are caused due to friction between branches of trees.

Answer 2

Answer:

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Disadvantages of friction:

• It always resists the motion, so extra energy is required to overcome it.

• It causes wear and tear of machines.

• It decreases the life expectancy of moving parts of vehicles.