Satellite Orbit Period Change if Earth Mass Multiplied by 4

[layla2525]

Homework Statement

If you suddenly multiplied the mass of Earth by a factor of 4, how would the period of a satellite change, if the radius of its orbit did not change?

4 times as long

1/4 as long

2 times as long

1/2 as long

Unchanged

Homework Equations

The Attempt at a Solution

I am not sure what equation to use...

 

[Simon Bridge]

Use Newtons Law of Gravity.