Posted by Anonymous on Saturday, October 31, 2009 at 3:32pm.
7) Find the force of gravity between two 74.0 kg physics students that are sitting 0.85 m apart
7579.24 N
5.057 x 10(7) N
None of these choices are correct
9.8 x 10(7) N
I'm unsure of how to begin.

Physics  Anonymous, Saturday, October 31, 2009 at 4:37pm
F= m1m2/d^2
F= 74*74/(0.85)^2
F= 5476/0.7225
F= 7579.24 N

Physics  drwls, Saturday, October 31, 2009 at 5:56pm
You left out the universal constant of gravity, G, which is a very small number. Look it up and apply it.
F= G*m1*m2/d^2
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