1. The problem statement, all variables and given/known data For the following image V1=67.9 V, V2=52.8 V, and V3=37.7 V. A proton's speed as it passes point A is 47566.0 m/s and it follows the trajectory shown. What is the proton's speed at point B? http://capa.physics.mcmaster.ca/figures/kn/Graph29/kn-pic2944.png [Broken] 2. Relevant equations 3. The attempt at a solution 1.ΔU=qΔV 2.ΔU= 0.5mV2^2-0.5mV1^2 i then solved for V2 and i didn't get the answer.... can someone elaborate?