alleryStart learning →In rotational motion, the rotation angle plays the same role as which linear quantity?
ALinear distance
BLinear momentum
CLinear density
DLinear mass
Answer & Solution
Correct answer: A. Linear distance
1. The rotation angle records how much an object has turned about its axis.
2. That is the rotational counterpart of how far an object has travelled in a straight line.
3. So the rotation angle is analogous to linear distance.
4. It is defined as the arc length divided by the radius of curvature.
_Source: OpenStax College Physics (CC BY 4.0), Ch 6 "Uniform Circular Motion and Gravitation", section Rotation Angle_
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