1. The problem statement, all variables and given/known data A wheel of radius R and mass M is dragged over a step of height h by force F applied horizontally at its center. What is the maximum value of F required so that the wheel climbs over the step? (Hint: wheel climb is equivalent to a rotation around the point of contact with the step.) 2. Relevant equations Not available. 3. The attempt at a solution I have no idea how to start this. But i would use potential energy perhaps?