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Friction — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsFriction1 Mark
Question
While walking on ice, one should take small steps to avoid slipping. This is because smaller steps ensure:
  1. Larger friction.
  2. Smaller friction.
  3. Larger normal force.
  4. Smaller normal force.
✓

Answer

  1. Smaller friction.

Explanation:

According to the first law of the limiting friction,

$\text{f}=\mu\text{N}$

where f is the frictional force

$\mu$ is the coefficient of friction

N is the normal reaction force

When we take smaller steps on ice, the normal reaction force exerted by the ice is small. Therefore, the smaller steps ensure smaller friction.

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