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Homework Help: Electric Field question

  1. Jan 13, 2009 #1
    1. http://www.prep101.com/MCAT/102MCATPhysicsAnswers.pdf [Broken] number 17


    3. Here is my attempt:

    First I figure I have to find the deceleration of the particle. So I plugged it into the v(final)^2= v(initial)^2 + 2ax. I solved for a and got a and got -240000.

    I don't know if I am correct here but I plugged the accel and mass into F = ma and got a force of 1.608*10^-21N

    I also tried substuting equations such as =

    F = Eq
    to ma = Eq but I still haven't gotten an answer along the lines of the choices. Please help me.

    Thanks in advance.
     
    Last edited by a moderator: May 3, 2017
  2. jcsd
  3. Jan 13, 2009 #2

    gabbagabbahey

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    You have the right idea, but I get [itex]a=-5.76 \times 10^{10} \text{m/s}^2[/itex]. Double check your calculation :smile:
     
    Last edited by a moderator: May 3, 2017
  4. Jan 13, 2009 #3
    Lol, wow.....and I thought I was doing it all wrong, I just put the wrong numbers into the calculator. Thanks
     
  5. Jan 13, 2009 #4

    gabbagabbahey

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