Gravitational Tension forces on a moon and a planet?

[anonsify]

Homework Statement

Jupiter's moon Io is has an orbital radius of 421,000 km, around the planet Jupiter (MJ = 1.9 x 10²⁷ kg). Io's radius is 1821 km and its mass is 8.93 x 10²² kg. Calculate the tensional force inside Io, as a result of Jupiter's gravitation.

Homework Equations

F_g= GMm / r²

The Attempt at a Solution

I tried using F_g1 - F_g2 to get the answer, I don't know if that's even remotely close to the right answer.

 

[tiny-tim]

welcome to pf!

hi anonsify! welcome to pf!

just use good ol' https://www.physicsforums.com/library.php?do=view_item&itemid=26" for a rock at the surface ……

the forces on it are the tension plus the gravitational force,

and the acceleration is the https://www.physicsforums.com/library.php?do=view_item&itemid=27"