If friction is caused due to interlocking of surface irregularities then why does a fan stop when switched off?

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Solution

When fan is switched off, the power is cut off. Then it stops due to air friction. That is air opposes the motion of fan wheel.

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Similar questions

Q. Consider the following statements:

Statement 1: Friction is caused due to interlocking of irregularities present on the surfaces in contact.
Statement 2: Frictional force increases if the two surfaces are pressed harder.

Which of these statement is correct?

Q. Which type of friction occurs due to interlocking between microscopic irregularities on surfaces?

Q. The interlocking between the irregularities of two surfaces in contact causes friction.

Consider the following statements:

Statement 1: The friction is caused by the interlocking of irregularities in the two surfaces.
Statement 2: The force of friction will increase if the two surfaces are pressed harder.

Choose the correct option:

Q. The causes of friction are molecular adhesion, interlocking of surface irregularities and plowing effect.

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