How to find the mass of a planet when given the radius?

[CluelessPhysics]

1. So for homework my teacher gave us this question (and this is quoted from his worksheet):
You graduate college with a degree in astrophysics and are assigned as an astronaut to explore a distant planet for NASA. You land on this planet and are told to determine the mass of the planet there. You have a meterstick and a stopwatch. Observations from space tell you the radius of the planet that you land on. How do you go about measuring the mass of this planet?

2.F=G*m1*m2/R^2

How do I even begin to complete this problem? Do I have to find the acceleration of gravity on the planet? Any help is appreciated.

 

[ehild]

Welcome to PF!

1. So for homework my teacher gave us this question (and this is quoted from his worksheet):
You graduate college with a degree in astrophysics and are assigned as an astronaut to explore a distant planet for NASA. You land on this planet and are told to determine the mass of the planet there. You have a meterstick and a stopwatch. Observations from space tell you the radius of the planet that you land on. How do you go about measuring the mass of this planet?

2.F=G*m1*m2/R^2

How do I even begin to complete this problem? Do I have to find the acceleration of gravity on the planet? Any help is appreciated.

Yes, you have to find the gravitational acceleration on the surface of the planet.