# physics

posted by Kelsey

A satellite moves in a circular orbit around Earth at a speed of 4390 m/s
(a) Determine the satellite's altitude above the surface of Earth.(meters)

(b) Determine the period of the satellite's orbit.
(hours)

I used the equation M(sattelite)V^2/r = M(sattelite)(Mass(earth)G/r^2

and tried to solve for r by canceling out one r and the M(sattelite) which gave me

r = GM(earth)/v^2

the answer i keep getting is 20,592,718.12m

but it is not right....

1. drwls

Have you tried subtracting the radius of the Earth? They asked for the altitude. "r" is the distance from the center of the Earth.

2. Kelsey

oh wow, thanks....

wish I would have thought of that.

it worked.

## Similar Questions

1. ### Physics

A satellite of mass 220 kg is launched from a site on Earth's equator into an orbit at 200 km above the surface of Earth. (a) Assuming a circular orbit, what is the orbital period of this satellite?
2. ### physics

A satellite moves in a circular orbit around Earth at a speed of 4390 m/s. (a) Determine the satellite's altitude above the surface of Earth. m (b) Determine the period of the satellite's orbit. h am I supposed to use rotational equations …
3. ### physics

HELP PLEASE!!! A satellite moves in a circular orbit around Earth at a speed of 5085 m/s. (a) Determine the satellite's altitude above the surface of Earth. (b) Determine the period of the satellite's orbit.
4. ### physics...

A satellite moves in a circular orbit around the Earth at a speed of 5661 m/s. (a) Determine the satellite's altitude above the surface of the Earth. i'm using the equation Gm/(r+h)=9.8 where h=altitude and i keep coming up with the …
5. ### physics

A satellite moves in a circular orbit around the Earth at a speed of 5661 m/s. (b) Determine the period of the satellite's orbit. the satilites altitude above the surface of earth is 6076312.71m. im using the equation P=2*pi*r/v and …
6. ### Physics 203

A satellite with a mass of 310 kg moves in a circular orbit 7.00*10^7 m above the Earth's surface. (a) What is the gravitational force on the satellite?
7. ### physics

A satellite moves in a circular orbit around the Earth at a speed of 6.1 km/s. Determine the satellite’s altitude above the surface of the Earth. Assume the Earth is a homogeneous sphere of radius 6370 km and mass 5.98 × 10 24 kg. …
8. ### Physics

A satellite moves in a circular orbit around the Earth at a speed of 5.4 km/s. Determine the satellite’s altitude above the surface of the Earth. Assume the Earth is a homogeneous sphere of radius 6370 km and mass 5.98 × 10 24 kg. …
9. ### help physics

A satellite, LangSat, moves in circular orbit around the Earth at a speed of 4.95kms-1. (i) What is the altitude of the satellite (ii) Determine the period of the satellite’s orbit (iii) What is the value of the gravity, g, at the …
10. ### physics

A satellite of mass 205 kg is launched from a site on Earth's equator into an orbit at 200 km above the surface of Earth. (a) Assuming a circular orbit, what is the orbital period of this satellite?

More Similar Questions