Gravity on other planets

[Gogsey]

The planet Zond 4(made up) has a mass which is one third the mass of the earth, and a radius which is one quarter of the earth's radius.

What is the accelerationdue to gravityon the surface of Zond 4?

Thanks

[clive]

Don't you think is better to turn over your physics book before you post? What you need for this problem is a very, very elementary equation. Search your book and give us some equations you find appropriate for this problem. After that we'll find a solution!

[DB]

If you are doing this for the sake of physics :biggrin:, and don't have the textbooks (otherwise you might have posted on the homework threads), then I'll give you a start.

The gravitational field strengh equation

E_{g.field}=4\pi G \frac{m}{4\pi r^2}

Use kilograms and meters and plug in the numbers. :wink:

[cepheid]

If you are doing this for the sake of physics :biggrin:

Well of course he is! Didn't you hear about the recent discovery of the planet Zond 4? :rofl:

[DB]

Haha, yes of course!