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6. system of particles and rotational motion — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysics6. system of particles and rotational motion1 Mark
MCQ
A uniform heavy disc is rotating at constant angular velocity $\omega$ about a vertical axis through its centre and perpendicular to the plane of the disc.  Let $L$ be its angular momentum.  A lump of plasticine is dropped vertically on the disc and sticks to it.  Which will be constant
  • A
    $\omega$
  • B
    $\omega$ and $L$ both
  • ✓
    $L$ only
  • D
     Neither $\omega$ nor $L$
✓

Answer

Correct option: C.
$L$ only
c
External torque $=0$

$\mathrm{L}=\mathrm{constant}$

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