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Motion in Two Dimension — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsMotion in Two Dimension1 Mark
MCQ
A body moves with constant angular velocity on a circle. Magnitude of angular acceleration
  • A
    $r Z$
  • ✓
    Constant
  • C
    Zero
  • D
    None of the above
✓

Answer

Correct option: B.
Constant
(b)$\vec{v}=\vec{\omega} \times \vec{r}=\left|\begin{array}{ccc}\hat{i} & \hat{j} & \hat{k} \\3 & -4 & 1 \\5 & -6 & 6\end{array}\right|=-18 \hat{i}-13 \hat{j}+2 \hat{k}$

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