Gravitational Attraction Between Two Balls

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The discussion focuses on calculating the gravitational attraction between two 6.3 kg balls with a radius of 0.11 m in contact. The formula used is Fg = G*m1*m2/r^2, where the distance between the centers of mass is determined to be 0.22 m. Participants express confusion over the calculations, with one user expecting an answer of 5.47E-8. Correct arithmetic is emphasized as crucial to obtaining the right result. Additionally, a related problem involving finding masses based on gravitational force is mentioned.
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two 6.3 kg balls with radii of .11m are in contact w/ each other. what is the gravitational attraction b/w the balls.

radius = .11m
mass = 6.3kg

Fg = G*m1*m2/ r^2

i just tried pluggging in the givens and somehow it's a trick question and i get the incorrect answer.
i shold be getting 5.47E-8.
 
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testttt,,,
 
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What is the distance between the centres of mass of the balls?
 
hmm .11m x 2?
 
mikejonesss said:
hmm .11m x 2?
Look's good to me. If you do the arithmetic correctly, you should obtain the correct answer.
 
yes. thank you. i also had a problem where the Fg is given and you have to find the masses. one mass is twice the other.
 

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