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Moon Experiment (Posted on 2004-11-22) Difficulty: 5 of 5
Assume the moon is a perfect sphere and a straight tunnel has been drilled through the center. How long would it take a 1kg ball dropped from one end of the tunnel to reach the center? Ignore all resistances.

If a second 1kg ball is dropped 10 seconds after the first one, when and where in the tunnel would they first meet?

Idealized Moon Stats:
- Diameter: 3480 kilometers
- Mass: 7.38x10^22 kilograms (uniform density)

See The Solution Submitted by Brian Smith    
Rating: 2.4000 (5 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Question No Subject | Comment 17 of 22 |
I ask: Would it ever go through?

The moon spins at a fast rate. Couldn't centripetal force propel it outwards or is that just a quick answer? I don't know calculus etc, so I could be wrong and trying to find a solution to a problem I'm not capable of. But centripetal (centrifugal? Ditz mood. I blame the medication.) force could cause it to accelerate right back outwards after a moderate time.

  Posted by Nikkie Byars on 2005-03-23 01:40:43
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