Stupid easy question i cant get (1 Viewer)

[FcUk]

A space probe is in orbit around a newly discovered planet at a distance of 10000km above the panets surface.
The planets diametre is measred as being 14000km and the mass of the planet is found to be 1.2 x 10^25

What is the value of gravitational acceleration in the space probes orbit

i cant get the right answer?

i used g=GM/r^2

 

[d_elmo]

what was the answer?

i got about 1.4 m/s

which doesnt seem right

i tried it again, with radius 7000km and i got about 2.77 m/s

 

[mojako]

r
= (radius of planet + altitude) in metres
= (0.5*14000,000 + 10000,000)

the units in most, if not all, formulae are:
metre
kilogram
second

 

[senso]

you're using the right formula, are you sure that your putting in everything right?
Like halving the diameter etc?

 

[FcUk]

you're using the right formula, are you sure that your putting in everything right?
Like halving the diameter etc?

oops theres was my problem..i didnt half the diametre

thanks

 

[gordo]

make sure u remember all that for the exam
read the question and interpret the data carefully

 

[jumb]

In the trial i didnt square or cube anything.

I suck.