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Homework Help: Parallel plate - uniform electric field help

  1. Feb 12, 2013 #1
    1. The problem statement, all variables and given/known data
    A parallel-plate uniform electric field with a strength of 325 N/C is oriented as shown below. An electron (q = 1.6 × 10-19 C, m = 9.11 × 10-31 kg) is released (from rest) inside the field and moves 3.2 cm to the left. What is the final speed of the electron at the end of the 3.2-cm distance?

    2. Relevant equations

    3. The attempt at a solution
    I did this:
    Ek= .5(09.11 × 10-31)(0)2 and got 0... :/ any help would be appreciated.. I don't know where to start
    Last edited: Feb 12, 2013
  2. jcsd
  3. Feb 13, 2013 #2


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    Homework Helper

    well you've done right so far. you have got the initial KE of the electron, which is zero. For now, try to find the final KE (and then afterwards, you can get final speed). So, in this situation, how can you find the final KE? What physics principles can you apply?
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