# physics

posted by .

A boulder weighs 800N at the surface of the earth. What would be its weight at a distance of three earth's radii from the center of the earth?

• physics -

Use the inverse square law. You move three times farther away. Square that and divide the result into 800 N.

## Similar Questions

1. ### physics

At what altitude above the Earth's surface would your weight be three-fifths of what it is at the Earth's surface?
2. ### Physics

Calculate the force of gravity on a spacecraft 19200 km (3 earth radii) above the Earth's surface if its mass is 1600 kg. Hint: At three earth radii from the surface of the Earth, the gravity force (weight) of the spacecraft will be …
3. ### physics

Find the distance (measured in earth radii, RE) from the center of the earth to a point outside the earth where the acceleration of gravity due to the earth is exactly one ninth of its value on the surface of the earth.
4. ### physics

A boulder weighs 800N at the surface of the earth. What would be its weight at a distance of three earth's radii from the center of the earth?
5. ### physics

As you walked on the moon, the earthâ€™s gravity would still pull on you weakly and you would still have an earth weight. How large would that earth weight be, compared to your earth weight on the earthâ€™s surface?
6. ### Algebra II

The force of attraction between the earth and some object is called the weight of that object. The law of gravitation states, then, that the weight of an object is inversely proportional to the square of its distance from the center …
7. ### Algebra II

The force of attraction between the earth and some object is called the weight of that object. The law of gravitation states, then, that the weight of an object is inversely proportional to the square of its distance from the center …
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. ### 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 …
10. ### Physics

Al the astronaut has a weight of 1600 N when he is standing on the surface of earth. What is the force of gravity action on him when he is in space station orbiting earth at a distance of four earth radii from the center of the earth?

More Similar Questions