Radian Wheel
Purpose
Provides a physical demonstration that a circle's circumference equals approximately 6.28 radii (\(C = 2\pi r\)), giving students an intuitive understanding of why there are \(2\pi\) radians in a full rotation. Essential groundwork for angular kinematics.
Figure 1:
Bicycle wheel rim mounted vertically with a pink flag marking a reference spoke. A string cut to the circumference length is used during the demonstration to measure out radius-length intervals.