The diameter of a solid disc is 0.5 m and its mass is 16 kg. It is allowed to rotate…

Physics · NEET · NTA ExamsRotational motion

The diameter of a solid disc is 0.5 m and its mass is 16 kg. It is allowed to rotate about an axis passing through its centre. What will be the torque if its angular velocity is increased from zero to 120 rpm in 8 s?
  1. \(0.785 \mathrm{~N}-\mathrm{m}\)
  2. \(0.135 \mathrm{~N}-\mathrm{m}\)
  3. \(7.31 \mathrm{~N}-\mathrm{m}\)
  4. \(8.53 \mathrm{~N}-m\)

Answer

(A) 0.785 ~N - m

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