1. The problem statement, all variables and given/known data http://session.masteringphysics.com/problemAsset/1020825/7/jfk.Figure.21.P56.jpg A proton's speed as it passes point A is 4.40×10^4 m/s. It follows the trajectory shown in the figure. What is the proton's speed at point B? 2. Relevant equations Knowing this would be very helpful 3. The attempt at a solution No attempt yet...If I knew what formulas to use, that would be very helpful.