1. The problem statement, all variables and given/known data You have a wheel of mass m and radius R you're trying to push it onto a block of height h that it's next to. Find the minimum force F that will let you do this. F is completely horizontal and acts upon the center of the wheel. 2. Relevant equations I'm trying to solve this by pretending the wheel is a lever attached to the edge of the block. It has two forces acting on it F and gravity. To find the minimum force I assume F*sin(theta)*R=G*Sin(theta)*R 3. The attempt at a solution I believe that the line from the part where the wheel touches the block to the center of the wheel makes a degree of arcsin(1-h/r) Then I try to calculate the degree each force makes with the perpendicular of the imaginary lever to get g*m*cos(Pi/2-arcsin(1-h/r))==F*cos(arcsin(1-h/r)). Then I solve for F and get a wrong answer.