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NEET2006PhysicsRotational MotionActual

The angular momentum of a rotating body changes from A₀ to 4 A₀ in 4 seconds. The torque acting on the body is :

Options

  1. A3 / 4 A₀
  2. B4 A₀
  3. C3 A₀
  4. D3 / 2 A₀

Correct answer

A. 3 / 4 A₀

Step-by-step solution

Torque aligned = d L d t & = (4 A₀-A₀ ) 4 & = 3 A₀ 4 . aligned

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