Question

give some evils of friction.​

Answer 1

Answer:

Frictional force causes a lot of losses in general upkeep and wear and tear of machinery. ... But almost all crucial tasks cannot be carried out without the presence of friction. Basic activities like walking and writing on a surface are possible due to friction. Hence it is considered as a necessary evil .

Answer 2

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• Some of the effort (force) applied to machine is wasted in overcoming friction and so the efficiency of a machine decreases due to friction.

• The energy consumed to overcome friction is mainly converted into heat energy. The heat so produced, raises the temperature of machine and so the machine may be damaged.

• Friction wears out the rubbing surfaces.

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