The angular acceleration of a body, moving along the circumference of a circle, is: (a) along the radius towards the centre (b) along the tangent to its position (c) along the axis of rotation (d) along the radius, away from centre

Answer: (c). α = (dω)/(dt), and ω points along the axis of rotation. For motion in a fixed circle only the magnitude of ω changes, so α is also along the axis. So the answer is (c).

The angular acceleration of a body, moving along the circumference of… | NEET 2023

Q26NEET 2023Easy

Rotational Kinematics & Dynamics

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

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Answer: (c)

$\vec{\alpha} = \frac{d\vec{\omega}}{dt}$ , and $\vec{\omega}$ points along the axis of rotation.
For motion in a fixed circle only the magnitude of $\vec{\omega}$ changes, so $\vec{\alpha}$ is also along the axis.
So the answer is (c).

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