Posted by **Dominique** on Monday, November 22, 2010 at 11:37am.

Joe has a mass of 50 kg and Sally has a mass of 30 kg. They sit in class with a separation of 0.5 meters. Find the gravitational attraction between Joe and Sally.

- physics -
**drwls**, Monday, November 22, 2010 at 12:25pm
Use Newton's universal law of gravity, with the constant G

F = G*m1*m2/R^2

R should be in meters, and masses in kg, if you want the force in Newtons. Look up the value of G if your don't know it. It is NOT the same as g.

## Answer this Question

## Related Questions

- joe has a mass of 50 kg and sally has a madphysics - joe has a mass of 50 kg and...
- physics - Tom has a mass of 69.0 kg and Sally has a mass of 54.0 kg. Tom and ...
- physics - Tom has a mass of 67.2 kg and Sally has a mass of 58.5 kg. Tom and ...
- physics - Sally has a mass of 58.0 kg and Earth has a mass of 5.98 1024 kg. The ...
- physics - Tom has a mass of 72.2 kg and Sally has a mass of 49.4 kg. Tom and ...
- accounting - Harry and Sally were divorced three years ago. In July of the ...
- Physics - Sally Skier skiis down a rough ice covered 10.0 m high incline into a ...
- earth - Find the ratio of the gravitational attraction between (a)a man of mass ...
- Physics - Gravitational force of attraction "F" exists between two point masses ...
- physics - Gravitational force of attraction “F” exists between two point masses ...