alleryStart learning →How is rotational motion defined?
ACircular motion of an object about its axis of rotation
BAny motion where the object speeds up over time
CMotion that always follows a straight line
DMotion where the velocity never changes
Answer & Solution
Correct answer: A. Circular motion of an object about its axis of rotation
1. Rotational motion is defined around an axis, not by whether speed or velocity is changing.
2. The motion traces a circular path around that axis of rotation.
3. A car speeding up along a straight road is not rotating, even though its speed is changing.
_Source: OpenStax Physics (CC BY 4.0), Ch 6 "Circular and Rotational Motion", section 6.1 Angle of Rotation and Angular Velocity_
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