I just really have trouble deciding which mass to use and wether "r" would mean to use the dist. between objects or the radius. I really really really want to understand and would love any help! Also, how do u check ur answers? It seems like valuable information to know.
Homework Statement
Planet X has a mass of 6.42x10^20 kg and a radius of 2400km. A satellite with a mass of 1500kg is in orbit around Planet X at an altitude of 300km.
a) what is the Force of Gravity?
b) What is the acceleration of the satellite while in orbit?
c) Find the speed of the...
Homework Statement
In this problem find the force of gravity of Al. Al is standing at the top of Mt. Everest at an elevation of 8,848 m. Al has a mass of 58 kg. The Earth has a mass of 5.97e24 and a radius of 6.38e6m. What is the force of gravity acting on Al?
Homework Equations
F...