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Magnitude of the maximum gravitational force

  1. Feb 1, 2010 #1
    1. The problem statement, all variables and given/known data

    A bowling ball (mass = 5.9 kg, radius = 0.11 m) and a billiard ball (mass = 0.36 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other?

    2. Relevant equations


    3. The attempt at a solution

    6.67*10^-11*5.9*.36/-(.11+.028)^2 = -7.43913043 × 10^-9 N

  2. jcsd
  3. Feb 1, 2010 #2
    Right. altough I don't think the minus sign is right.
  4. Feb 1, 2010 #3
    but that's the minus sign from the formula isn't it?
  5. Feb 1, 2010 #4
    The formula is usually given without a minus sign. The question also asks for the magnitude of the force, wich has to be positive.
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