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**1. Homework Statement**

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. Homework Equations**

Not available.

**3. The Attempt at a Solution**

I have no idea how to start this. But i would use potential energy perhaps?