Determine the NEW force of attraction between two masses

[OverAchiever]

Homework Statement

Two masses are in space. At a certain separation, the two masses have a force of gravitational attraction of 6.88 x 10 ²¹N Determine the new force of attraction if the separation distance between the two masses is tripled, and mass of one object is reduced by half.

Homework Equations

Fg = Gm₁m₂/d²

The Attempt at a Solution

F_new/F_old = Gm₁m₂/d²Cancel out G,m₁, m₂
6.88 x 10²¹ /F_old = 1/d²_new divided by 1/d²_old

This is as far as I could get and now I don't know what to do. I have some other questions that I would like to ask after I can solve this one if it is not a problem. I have been going through some tough times and missed a lot of class, so now I need to get an understanding of the new concepts I missed by solving these problems

 

[tiny-tim]

Welcome to PF!

Hi OverAchiever! Welcome to PF!

Why not just replace d by 3d, and m₁ by m₁/2, in the formula?