Topic: Uniform circular motion· Kinematics

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

1. along the axis of rotation

2. along the radius, away from centre

3. along the radius towards the centre

4. along the tangent to its position

Doubtly Asked 30 Oct 2026 NEET UG 2023 Practice test neet Save WhatsApp Report

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Answer: 1. along the axis of rotation

Angular acceleration \(\vec\alpha = d\vec\omega/dt\) is a vector along the axis of rotation, like \(\vec\omega\). For rotation about a fixed axis it is along (or opposite to) the axis.

Radial and tangential directions describe linear accelerations (centripetal and tangential), not \(\vec\alpha\). The answer is along the axis of rotation.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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

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