# Need help with a problem

I'm trying to figure out this problem and i am having no luck. Any help would be great.

a) How much voltage would be need, in order to accelerate protons from rest to 5.0x10 to the 6th m/s.
b) what is the kinetic energy of these protons in eV, after they hit the top speed indicated in part a?

Tide
Homework Helper
The amount of work done by the electric field is $E = q V$.

try this

Try this,
qV=(m*v^2)/2
q= charge on proton, v= speed, m= mass

Kinetic energy, K= 0.5m*v^2 units will be in joules.
to convert it in eV divide it by 1.67*10^-19.
have better luck this time