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Homework Help: Electric field question

  1. Feb 6, 2005 #1
    A proton accelerates from rest in a unifor electric field of 640 N/C. At some later time, its speed is 1.20X10^6m/s. Find the magnitude of the acceleration of the proton.

    Hmm.. not sure what formula to use on this one.. can someone help?
     
  2. jcsd
  3. Feb 6, 2005 #2
    You can use the formulae:

    [tex]F_{net} = ma[/tex]

    [tex] E = \frac{F}{q}[/tex]
     
  4. Feb 6, 2005 #3
    hmm im lookin for a right? so what am i suppose to plug in for m and q?
    im confused..
     
  5. Feb 6, 2005 #4
    m = the mass of a proton
    q = the charge of a proton
     
  6. Feb 6, 2005 #5
    yeah i got that but its not given in the problem..
     
  7. Feb 6, 2005 #6
    Don't you have a data sheet in your book. If not, I can give the values to you.
     
  8. Feb 6, 2005 #7
    hmm.. is it m=1.67x10^-27? what is q?
     
  9. Feb 6, 2005 #8
    Yes, and q is [tex] 1.60 \times 10^{-19}C[/tex]
     
  10. Feb 6, 2005 #9
    ok thanks a lot!! i reallly appreciate it :-D
     
  11. Feb 6, 2005 #10
    glad i could help :cool:
     
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