1. The problem statement, all variables and given/known data A particle has the potential energy shown in the figure. (Figure 1) What is the x-component of the force on the particle at x =5, 15, 25, and 35 cm? I'm stuck on finding the Fx at 25 & 35 cm. 2. Relevant equations F = -du/dx 100 N = 1J/cm 3. The attempt at a solution Slope throughout 20-40 cm is a constant positive .5. So at 25 cm it should be : F = -.5/25cm * 100 = -2 N This is incorrect. I'm really confused?