Posted by **Adrianne** on Thursday, April 1, 2010 at 7:53pm.

You observe an arti cial satellite orbiting the earth and estimate it is at

an altitude h = [03] km above the earth's surface and has a mass

m = 3500 kg. You wish to calculate when the satellite will be back in the same position. From the second law of

motion and the gravitational force law, calculate the following:

(a) What is the satellite's velocity? (m/s)

(b) What is the period of the satellite's motion?

The only force acting on the satellite is the force of gravity (Fg) right? So by combining the two laws I have Fg = ma. I solved for Fg, but I need some pointers on where to go from there.

- Physics -
**Damon**, Thursday, April 1, 2010 at 8:28pm
mass is m (it will not matter in the end)

if height above earth is h

then radius of orbit = r = Rearth + h

then

Fg = G m Mearth/r^2

a = v^2/r

so Fg = m v2/r

so

G m Mearth/r^2 = m v^2/r

note m cancels, feather drifts right beside the space station

G Mearth/r = v^2

there you go

get v then it goes 2 pi r at v

## Answer This Question

## Related Questions

- physics - 3. A satellite of mass 500 kg orbits the Earth with a period of 6000 s...
- physics - A satellite has a mass of 100 kg and is in an orbit at 2.00*10^6 m ...
- SCTD - Physics a satellite orbiting 3.22 times 10 to the 5th power meters above ...
- physics - NASA launches a satellite into orbit at a height above the surface of...
- math - The orbital velocity of a satellite is given by v=√GM/R+h, where G...
- math - The orbital velocity of a satellite is given by v=√GM/R+h, where G...
- Physics - A satellite is orbiting the earth just above its surface. The ...
- physics - How much work is required to lift a 600-kg satellite to an altitude of...
- physics - A satellite is in a circular orbit around the Earth at an altitude of ...
- physics - Two Earth satellites, A and B, each of mass m, are to be launched into...

More Related Questions