I have a few questions:
1. Describe the origin of the centripetal force that causes an object to follow a circular path.
2. I want to know whether I've approached this correctly.
Saturn has at least eighteen natural satellites, two of which are Titan and Tethys.mass of Titan = 1.35 x 10^23 kg
radius of Titan = 2.6 x 10^6 m
period of Titan's orbit = 1.38 x 10^6 s
radius of Titan's orbit = 1.22 x 10^9 m
mass of Tethys = 7.4 x 10^20 kg
radius of Tethys orbit = 2.9 x 10^8 m
Calculate the gravitational field strength of the surface of titan.
g = GM/r^2.
G = 6.67 x 10^-11
M = 1.35 x 10^23 kg
r = 2.6 x 10^6 m
Is that value of r correct? Which radius do I use? How do I know which one to use in a case like this?
Help would be much appreciated. Thank you