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Concepts Of Physics MCQ Edition [Volume 1]PhysicsRotational Mechanics

Examine the two equations given below: (A) L = I (B) dL dt = For a noninertial frame of reference,

Options

  1. AB is correct but A is incorrect
  2. Bboth A and B are incorrect
  3. Cboth A and B are correct
  4. DA is correct but B is incorrect

Correct answer

D. A is correct but B is incorrect

Step-by-step solution

The equation L = I is a kinematic relation that defines the angular momentum of a rigid body. It depends on the mass distribution and the angular velocity relative to the frame of reference. This definition is valid in any frame, including non-inertial frames. The equation dL dt = is the rotational analogue of Newton's second law, where is the net torque due to real forces. Newton's laws are valid only in inertial frames of reference. In a non-inertial frame, pseudo forces must be taken into account, which exert ps

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