Which of the following statements is correct regarding friction between two surfaces in contact-Friction exists between surfaces only if they are roughSmooth surfaces do not have frictionFriction is solely because of the interlocking of uneven surfacesAll the statements are incorrect

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Nature of surface in contact

Which of the ...

Question

Which of the following statements is correct regarding friction between two surfaces in contact?

Friction exists between surfaces only if they are rough

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Smooth surfaces do not have friction

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Friction is solely because of the interlocking of uneven surfaces

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All the statements are incorrect

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Solution

The correct option is D All the statements are incorrect
Friction opposes relative motion between two surfaces in contact. Rough surfaces develop friction because of interlocking of irregularities. However, interlocking of irregularities is not the sole cause of friction. Smooth surfaces can also develop friction because of formation of bonds between them. This is referred to as "adhesion".

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Similar questions

Q. Interlocking of the surfaces is the sole cause for friction between two surfaces.

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 statements is/are correct?

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Statement II: When a brick is pushed on a soft carpet, there is friction because carpet has a soft surface and can undergo deformations.

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Statement 1: Friction is caused due to interlocking of irregularities present on the surfaces in contact.

Statement 2: Rough surfaces generally have more friction between them.

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