# physics

What is the ratio of the gravitational force on you when you are 5800 km above the Earth's surface versus when you are standing on the surface? (The Earth's radius is about 6400 km.)

1. 👍
2. 👎
3. 👁
1. small r = 6,400
big r = 12,200

little force / big force
= little r^2/big r^2 = 6.4^2/12.2^2
=.275

1. 👍
2. 👎

## Similar Questions

1. ### Physics

An astronaut of mass m in a spacecraft experiences a gravitational force F=mg when stationary on the launchpad. What is the gravitational force on the astronaut when the spacecraft is launched vertically upwards with an

1. What happens to the gravitational force between two objects if the distance between them triples? A. The force increases by a factor of 3 B. The force decreases by a factor of 9 C. The force increases by a factor of 9 D. The

3. ### PHYSICS

Compare the electric force holding the electron in orbit (r=0.53Ã—10âˆ’10m) around the proton nucleus of the hydrogen atom, with the gravitational force between the same electron and proton. What is the ratio of these two

4. ### Physics

A communications satellite is moving at a constant speed in a circular orbit around Earth. At any given instant in time, what is the resultant force on the satellite? A. zero B. equal to the gravitational force on the satellite C.

1. ### science

The gravitational force between two objects in space is 800 million newtons. If the distance between them is doubled, what size will the gravitational force be (in millions of newtons)?

2. ### Hard Calculus

The gravitational force, F, on a rocket at a distance, r, from the center of the earth is given by F=k/r^2 where k = 10^13 newton • km2. When the rocket is 10^4 km from the center of the earth, it is moving away at 0.2 km/sec.

3. ### Physics

The mass of an electron is 9.109×10−31 kg, and the magnitude of the charge of an electron is 1.602×10−19 C. What is the ratio of the gravitational force to the electrostatic force between two electrons? 3.093×10^22

4. ### Physics

Assume that in interstellar space the distance between two electrons is about 0.87 cm. The electric force between them are repulsive. Calculate the electric force between these two electrons. The value of the Coulomb constant 9 ×

1. ### Physics help----------thanks

A charged cloud system produces an electric field in the air near the Earth's surface. A particle of charge -2.2 10-9 C is acted on by a downward electrostatic force of 3.0 10-6 N when placed in this field. (c) What is the

2. ### Analytical Physics II

A charged cloud system produces an electric field in the air near Earth's surface. A particle of charge -2.1 x 10-9 C is acted on by a downward electrostatic force of 4.3 x 10-6 N when placed in this field. (a) What is the

3. ### physics

1) write the formula to find the magnitude of gravitational force between earth and an object on earth's surface 2) how does the value of gravitational force 'f'change between two objects? 3) what is direction of an object moving

4. ### Physics

Halley's Comet orbits the sun about every 75 years due to the gravitational force the sun provides. Compare the gravitational force between Halley's Comet and the sun when the Comet is at aphelion (its greatest distance from the