A proton's speed as it passes point A is 5.00ï¿½104m/s . It follows the trajectory shown in the figure.
What is the proton's speed at point B?
Express your answer with the appropriate units.
conservation of energy
q V + 1/2 mv^2 = q V + 1/2 mv^2
1.6E-19*30 + 0.5*1.67E-27*5.0E4^2=1.6E-19*-10 + 0.5*1.67E-27*v^2