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Class 11PhysicsSystem of Particles and Rotational MotionConservation of angular momentum (combined translation and rotational motion)
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Two discs of moment of inertia $I_1$ and $I_2$ and angular speeds $\omega_1$ and $\omega_2$ are rotating along collinear axes passing through their centre of mass and perpendicular to their plane. If the two are made to rotate together along the same axis,the rotational $KE$ of the system will be:

  • A
    $\frac{I_1\omega_1 + I_2\omega_2}{2(I_1 + I_2)}$
  • B
    $\frac{(I_1 + I_2)(\omega_1 + \omega_2)^2}{2}$
  • C
    $\frac{(I_1\omega_1 + I_2\omega_2)^2}{2(I_1 + I_2)}$
  • D
    None of these
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Class 11

Physics Questions

Chapter

System of Particles and Rotational Motion

Subtopic

Conservation of angular momentum (combined translation and rotational motion)

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