## Essential University Physics: Volume 1 (4th Edition) Clone

1) The force is the greatest at the steepest point in the curve, which is B. 2) If it has energy $E_1$, the electron cannot pass point E, for it cannot go above the horizontal line through $E_1$ 3) If it has energy $E_2$, the electron cannot pass point C, for it cannot go above the horizontal line through $E_2$ 4) Force is 0 where the slope is horizontal, which occurs at points A and D. 5) Points B and E are the points where the slope is positive, meaning that the the force is pointing left.