How Do I Calculate the Gravity on Saturn with its Given Radius and Mass?

[HodaM]

I have got this word problem and I tried to solve but could not find the exact answer and I need the way to do it because my upcoming test has similar problems to it,,

Homework Statement

Saturnn has an equatorial radius of 6.00 * 10⁷m and a mass of 5.67 * 10²⁶Kg. Calculate the following:
a) the acceleration due to gravity of Saturn.
b) how many times greater is a person's weight on Saturn compared to that on Earth?

Homework Equations

F= mg
F_g= Gm1m2 / r²

The Attempt at a Solution

I don't know where to start from because I am used to solve similar problems starting with the acceleration due to gravity which is known to be 9.81m/s², but this only applies for Earth gravity and I don't know how to start solving this problem


Thank you for any help

 

[cristo]

Well, you can use your second equation to derive a g for Saturn, can't you?

 

[HodaM]

I guess so , the problem is that is joined the class late, and English is not my first language
but I will try my best


Thank you

 

[cristo]

I guess so , the problem is that is joined the class late, and English is not my first language
but I will try my best


Thank you

Sorry, my comment wasn't meant to come across as being abrupt. Perhaps I should rephrase it: how can you write your second equation so as to derive a 'g' for Saturn from it?

 

[HodaM]

Sorry, my comment wasn't meant to come across as being abrupt. Perhaps I should rephrase it: how can you write your second equation so as to derive a 'g' for Saturn from it?

Don't worry

I will try doing it and I understand it better now

Thank you very much