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Homework Help: Help with electric fields

  1. Nov 28, 2013 #1
    1. The problem statement, all variables and given/known data

    5. An alpha particle ( 2 protons and 2 neutrons) is placed between two stationary, charged objects. It is 0.0030 m to the right of the object carrying a +1.0 X 10-12 C charge, and 0.0020 m to the left of the object carrying a -2.0 X 10-12 C charge. Draw a picture and determine:

    a) the magnitude and direction of the electrical force acting on the alpha particle.

    b) the rate and direction of the acceleration of the alpha particle.

    2. Relevant equations

    3. The attempt at a solution

    I just don't understand I have the charge of the objects on both ends but I don't have the charge of the particle in the middle so how am I going to solve it?
  2. jcsd
  3. Nov 28, 2013 #2


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    Staff: Mentor

    Hi Coco12. Do protons carry an electric charge?
  4. Nov 28, 2013 #3
    Yes positive
  5. Nov 28, 2013 #4
    Is it 2+
  6. Nov 28, 2013 #5
    Do I just do 9*10^9(1*10^-19)(2)/ .0030^2

    And then the same for the other object ?
  7. Nov 28, 2013 #6
    Nvm I got it!
  8. Nov 28, 2013 #7
    Have to use charge of electrons
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