We will use a video to analyze the rotational motion of a bicycle wheel, caused by a descending sphere attached to the wheel by a string wrapped around the rim of the wheel. Rotational motion is everywhere around us, from the spinning of a desk fan to the rotation of the entire Earth, so it is important to understand some of its basic properties. Specifically, we will: 1. Study the dynamics behind the wheel's rotational motion 2. Take measurements from the video of the descending sphere's position at various times to determine its acceleration 3. Use these results to calculate the coefficient k in the expression kmr2 for the rotational inertia of the wheel.