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Homework Help: Need help with a problem

  1. Oct 5, 2004 #1
    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?
     
  2. jcsd
  3. Oct 5, 2004 #2

    Tide

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    The amount of work done by the electric field is [itex]E = q V[/itex].
     
  4. Oct 5, 2004 #3
    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
     
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