1. The problem statement, all variables and given/known data A string is wound tightly around a wheel. When the end of the string is pulled through a distance of ? cm, the wheel rotates through ? revolutions. What is the radius of the wheel? 2. Relevant equations 3. The attempt at a solution i'm confused about this simple problem because i believed that displacement and revolutions were the same for theta in a kinematics problem like this: theta = 1/2(w0 + w)t what equation would I use to solve such a problem.