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Question

Which of the following is not a cause of friction?

A
Interlocking between the surfaces in contact
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B
Adhesion due to bonds formed between the surfaces
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C
Deformation due to contact or plowing effect
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D
Area of contact
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Solution

The correct option is D Area of contact
Friction is caused due to:
  • Interlocking of irregularities of surfaces in contact
  • Adhesion due to bonds formed near the surface
  • The consequence of the sinking surfaces in one another (also known as the Plowing effect)
It is independent of the area of the surfaces in contact.

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