Q107 / 200 · NEET 2023 (All India) · Physics

The angular acceleration of a body, moving along the circumference of a circle, is:

Correct answer
A
along the axis of rotation
B
along the radius, away from centre
C
along the radius towards the centre
D
along the tangent to its position

Solution

In terms of linear acceleration it is given as, $\vec{a} = \vec{α} \times \vec{r}$ . Clearly direction of linear acceleration is perpendicular to both angular acceleration and radius vector.
Angular acceleration of a body, moving along the circumference of a circle is along the axis of rotation.

Hence, the correct answer is option: 'A'.

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