need help with this please. not sure if there is an equation for gravitational force, and which one to use.
The drawing shows one alignment of the sun, earth, and moon.
The gravitational force SM that the sun exerts on the moon is perpendicular to the force EM that the earth exerts on the moon.
mass of sun = 1.99 1030 kg,
mass of earth = 5.98 1024 kg,
mass of moon = 7.35 1022 kg.
The distances shown in the drawing are rSM = 1.50 1011 m and rEM = 3.85 108 m. Determine the magnitude of the net gravitational force on the moon.
What is rSM and rEM?
need some help with the equations please.
heres whats going on: http://img91.imageshack.us/img91/2585/p424cw9.gif