Question

To launch a communication satellite in a circular orbit 1000 km above the surface of the Earth, what orbital speed must be imparted to the satellite? Find the acceleration due to gravity at the orbit.

Answer 1

equate a(due to g) to a=v^2/r
a(due to g)=F(g)/m=|-GMm/r^2 x (1/m)|
=GM/r^2
so v^2/r=GM/r^2, by this you can find velocity b/c r is known, and both the mass of Earth and the gravitational constants are known.
Then you find the acceleration by plugging your velocity back to the equation a=v^2/r

Answer 2

is r=1000km? @lailaiwd

Answer 3

nope, you need to add the radius of Earth to 1000km

Answer 4

to get r?

Answer 5

I believe so. This is a common problem, and you can probably find similar solutions on Google.

Answer 6

thanks a lot!! x

Answer 7

definitely :D is that your picture? If so, you're pretty

Answer 8

haha..yes it is...
i get that doubt a lot!! lol

Answer 9

v=5.98 x 10^24 m/s?
a=2.20 m/s^2?
@lailaiwd

Answer 10

sorry... i'm not in the condition to to the numerics myself... it's almost 3 am, and I'm dozing

Answer 11

its ok...maybe you should try get some sleep...