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Rotational Mechanics — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsRotational Mechanics1 Mark
Question
A sphere is rolled on a rough horizontal surface. It gradually slows down and stops. The force of friction tries to:
  1. Decrease the linear velocity.
  2. Increase the angular velocity.
  3. Increase the linear momentum.
  4. Decrease the angular velocity.
✓

Answer

  1. Decrease the linear velocity.
  2. Increase the angular velocity.
Explanation:
If a sphere is rolled on a rough horizontal surface, the force of friction tries to oppose the linear motion and favours the angular motion.

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