1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?