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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