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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 constant torque acting on a uniform circular wheel changes its angular momentum from $A_0$ to $4A_0$ in $4\, second$. The magnitude of this toque is
  • ✓
    $3A_0/4$
  • B
    $A_0$
  • C
    $4A_0$
  • D
    $12A_0$
✓

Answer

Correct option: A.
$3A_0/4$
a
$\tau  = \frac{{4{A_0} - {A_0}}}{4} = \frac{3}{4}{A_0}$

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