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A constant torque of 200 ~N turns a flywheel, which is at rest, about an axis through its centre and perpendicular to its plane. If its moment of inertia is 50 ~kg - m ² , then in 4 second, what will be change in its angular momentum?

Options

  1. A800 ~kg - m ² / s
  2. B200 ~kg - m ² / s
  3. C40 ~kg - m ² / s
  4. D20 ~kg - m ² / s

Correct answer

A. 800 ~kg - m ² / s

Step-by-step solution

(B) Change in angular momentum = . t=200 4=800 ~kg ~m ² / s

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