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Rotational Mechanics — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsRotational Mechanics1 Mark
Question
Consider the following two equations:
  1. $\text{L}=\text{I}\omega$
  2. $\frac{\text{dL}}{\text{dt}}=\Gamma$
In noninertial frames:
  1. Both A and Bare true.
  2. A is true but B is false.
  3. B is true but A is false.
  4. Both A and Bare false.
✓

Answer

  1. A is true but B is false.
Explanation:
In non-inertial frames, $\frac{\text{dL}}{\text{dt}}=\Gamma_{\text{Total}}$
Here, $\Gamma_{\text{Total}}$ is the total torque on the system due to all the external forces acting on the system. So, equation (B) is not true as in non-inertial frames, pseudo force must be applied to study the motion of the object.

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