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March 28, 2015

Homework Help: Physics

Posted by Lindsay on Monday, December 17, 2007 at 3:14pm.

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 3.90E+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?

Bobpursely told me that:
Mm/Me=(d2/d)^2
where mm is mass moon, me mass earth, d2 is distance from craft to moon, and d is the distance from craft to earth.

My only question is, how can I get d in order to solve for d2?

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