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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
    F=kq1q2/r^2


    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

    NascentOxygen

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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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