Wednesday
July 23, 2014

Homework Help: Physics

Posted by Lindsay on Monday, December 17, 2007 at 10:58pm.

I still cannot solve this problem:
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 online homework site wants me to use ONLY the info given and solve for what I don't have. So I'm trying to get the distance from the craft to earth using the numbers given, but I can't seem to figure it out.

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