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Electric force of attraction between forces.

  1. Dec 10, 2013 #1
    Problem:
    What is the electric force of attraction between charges of 3 C and -10 C separated by a distance of 5 m?

    Equation: F= k x (Q x q / r^2)
    3 x -10 / 5^2 = -1.2 x 8.99E9 = 1.08 E10 N.

    Using this equation and the answer I found, I still am getting the wrong answer. Not sure what I am doing wrong but any help would be nice!
     
  2. jcsd
  3. Dec 10, 2013 #2
    Your calculation does not make sense.
    3x(-10)/5^2 does not give that number you show there.
    You forgot to include k?
    The final result looks OK.
     
  4. Dec 10, 2013 #3
    So 1.08 E10 is the right answer?
     
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