posted by Joe on .
Mars has a mass of about 6.8 × 1023 kg,
and its moon Phobos has a mass of about
9.5 × 1015 kg.
If the magnitude of the gravitational force
between the two bodies is 4.66 × 1015 N,
how far apart are Mars and Phobos?
F=GM1M2/d^2 calculate d