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Homework Help: Gravitational force

  1. Jun 23, 2012 #1
    1. The problem statement, all variables and given/known data

    Sphere A with mass 70 kg is located at the origin of an xy coordinate system; sphere B with mass 69 kg is located at coordinates (0.29 m, 0); sphere C with mass 0.40 kg is located at coordinates (0.15 m, 0.11 m). In unit-vector notation, what is the gravitational force on C due to A and B?

    2. Relevant equations

    3. The attempt at a solution
    I just have a quick question. How do you find distance between ac and bc. I know its simple i just don't wanna do the whole problem with wrong Rac and Rbc values. I graphed it and did Pythagorean theorem to find hypotenuse? Is this correct i got distance between ac to be .186 and bc to be .178. I got the physics down its the algebra that i need to check!
  2. jcsd
  3. Jun 23, 2012 #2


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    Science Advisor
    Homework Helper

    hi wbetting! :smile:
    (either say "the distance between a and c" or "the distance ac" :wink:)

    yes, pythagoras is the correct method (and your answers are correct) :smile:
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