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PhysicsNEET 2019Rolling motion and rotational kinetic energy

System of Particles and Rotational Motion

A disc of radius 2 m and mass 100 kg rolls on a horizontal floor. Its centre of mass has a speed of 20 cm/s. How much work is needed to stop it?

  1. A.3 J✓
  2. B.30 kJ
  3. C.2 J
  4. D.1 J

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