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PhysicsNEET 2019Torque, angular momentum and their conservation

System of Particles and Rotational Motion

A solid cylinder of mass 2 kg and radius 4 cm is rotating about its axis at the rate of 3 rpm. The torque required to stop it after 2 revolutions is:

  1. A.2×10−62 \times 10^{-6} N m✓
  2. B.2×10−32 \times 10^{-3} N m
  3. C.12×10−412 \times 10^{-4} N m
  4. D.2×1062 \times 10^{6} N m

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