# earth

posted by .

If a satalite weighs 90 kg at 10000 miles from the earth, how far away is it when it weighs 10 kg?

• earth -

since it weighs 1/9 its original weight, and

F = GMm/r^2

and the masses involved have not changed, that means that r^2 has grown by a factor of 9. So, the satellite is 3 earth radii away from earth center, or 2 earth radii high.

## Similar Questions

1. ### science

1) The moon is about 250,000 miles away from the Earth. To the nearest centimetre, how far would it be from the Earth in our scale model?
2. ### physics

can you walk me through this problem At what distance from the Earth will a spacecraft on the way to the Moon esperience zero net force due to these two bodies because the EArth and Mon pull with equal and opposite forces?
3. ### math

an object that weighs 234lb on jupiter weighs 100lb on earth. what would an object that weighs 400 lb on jupiter weigh on earth?
4. ### Algebra

The gravitational force between an object & the Earth is inversely proportional to the square of the distance from the object to the center of the Earth. If an astronaut weighs 210 lbs on the surface of the Earth, what will he weigh …
5. ### physics

The earth is moving around the sun,now a satalite with its escape velocity thrown out from the earth,if the earth will stop then escape velocity of the satalite will same or not?
6. ### earth

An object on earth weighs 6 times what it would weigh on the moon. An object weighs 72 pounds on earth. Write multiplication equation to find the weight of object on moon.
7. ### algebra

the weight of a body above the surface of earth varies inversely with the square of the distance from the center of the earth. if maria weighs 125 pounds when she is on the surface of the earth(3960 miles from the center),determine …
8. ### algebra

the weight of a body above the surface of earth varies inversely with the square of the distance from the center of the earth. if maria weighs 125 pounds when she is on the surface of the earth(3960 miles from the center),determine …
9. ### calculus

the weight of a person on or above the surface of the earth varies inversely as the square of the distance the person is from the center of the earth. if a person weighs 180 pounds on the surface of the earth and the radius of the …
10. ### Algebra

Your weigh on the moon is about 1/6 of your weigh on earth. Write and solve an equation to show how much a person weighs on earth if he weighs 16 lbs. on the moon .

More Similar Questions