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The coefficient of friction is _____ for ideal smooth surfaces like glass.

This question was previously asked in
HPCL Engineer (Civil) 04 Nov 2022 Official Paper
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  1. 1.0
  2. infinity
  3. 1.5
  4. zero

Answer (Detailed Solution Below)

Option 4 : zero
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Detailed Solution

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Concept:

Coefficient of friction:

  • The coefficient of friction (f) is a dimensionless quantity that describes the amount of resistance or friction between two surfaces in contact as they slide or move relative to each other.
  • It quantifies the force of friction between the two surfaces.
  • For an ideally smooth surface, the coefficient of friction is zero (0).
  • The coefficient of friction depends upon the surface roughness.
  • There are two types of coefficient of friction, coefficient of static friction and coefficient of kinetic friction.

​Hence option (4) is correct.

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