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4.2 friction — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysics4.2 friction1 Mark
MCQ
The maximum static frictional force is
  • A
    Equal to twice the area of surface in contact
  • ✓
    Independent of the area of surface in contact
  • C
    Equal to the area of surface in contact
  • D
    None of the above
✓

Answer

Correct option: B.
Independent of the area of surface in contact
b
The maximum static frictional force is independent of the area of surface in contact We know that: $f=y N=\mu i n g$. $f \propto \mu, f \propto m ;$

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