Posted by **Jon** on Monday, January 14, 2008 at 8:24am.

Consider a spaceship located on the Earth-Moon center line (i.e. a line that intersects the centers of both bodies) such that, at that point, the tugs on the spaceship from each celestial body exactly cancel, leaving the craft literally weightless. Take the distance between the centers of the Earth and Moon to be 3.72E+5 km and the Moon-to-Earth mass ratio to be 1.200E-2. What is the spaceship's distance from the center of the Moon?

- physics hey damon one more please! =] -
**bobpursley**, Monday, January 14, 2008 at 9:38am
Let R be the distance from Earth to Moon.

Let r be the distance from Earth to the spaceship, and R-r the distance from Moon to spaceship.

Then the force of gravity from spacecraft to Earth is EQUAL to the force of gravity from Spacecraft to Moon.

Set them equal, and solve for r.

## Answer this Question

## Related Questions

- physics - still cant get this one? so damon i know you wanna help! or anyone ...
- PHYSICS - Consider a spaceship located on the Earth-Moon center line (i.e. a ...
- Physics - Consider a spaceship located on the Earth-Moon center line (i.e. a ...
- Physics - Consider a spaceship located on the Earth-Moon center line (i.e. a ...
- PHYSICSS!!! - still cant get this one? so damon i know you wanna help! or ...
- Physics - I still cannot solve this problem: Consider a spaceship located on the...
- Calculus Physics - Imagine a spaceship on its way to the moon from the earth. ...
- Physics - A spaceship of mass 175,000 kg travels from the Earth to the Moon ...
- physics help please! - A spacecraft is on a journey to the moon. At what point...
- physics - magine a straight line connecting the centers of the earth and the ...