physics
posted by brian .
A rocket is used to place a satellite in orbit about a planet. The velocity of the satellite is
534 m/s and the radius of orbit is 1.21×108
m. What is the mass of planet?

mv²/R =GmM/R²
v² =GM/R
M= v²R/G
(the gravitational constant
G =6.67•10⁻¹¹ N•m²/kg²)