physics
posted by Xavier .
One of the Echo satellites consisted of an inflated spherical aluminum balloon 30 m in diameter and of mass 20 kg. Suppose a meteor having a mass of 9.2 kg passes within 4.4 m of the surface of the satellite. What is the gravitational force on the meteor from the satellite at the closest approach?

physics 
drwls
Use Newton's universal law of gravity,
F = G M1 M2 /R^2
M1 and M2 are the two masses
R must be measured center to center, so in this case R = 19.4 m
Solve for F
You may have to look up the universal constant G
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