1. The problem statement, all variables and given/known data The cup shown in the picture is filled with 6 oz of coffee. The center of gravity is located at G. If a vertical force is applied to the rim of the cup a shown in the picture, determine its magnitude so that the cup is on the verge of tipping. 2. Relevant equations sum of moments = 0 sum of forces = 0 w=mg 3. The attempt at a solution I summed the moments around point A and came up with the force = - .5 lbs. not sure if that's right, Do I need to factor in a normal force? Thanks!