perplexus.info :: Science : Moon Experiment

Moon Experiment (Posted on 2004-11-22)

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: ( You must be logged in to post comments.)

Subject	Author	Date
Further to Andy	John	2005-12-27 08:58:14
No Subject	Brandon	2005-05-16 13:50:30
ummm..	nilshady	2005-05-13 06:26:28
Correct solution	Andy	2005-05-07 18:49:41
...	Wayne	2005-03-23 02:19:55
No Subject	Nikkie Byars	2005-03-23 01:40:43
re: My memories from school	ajosin	2005-03-02 21:48:24
My memories from school	Brian Wainscott	2004-11-23 20:15:57
No Subject	np_rt	2004-11-23 19:46:10
re(2): Completely Analytical Solution (Physics + Differential Calculus)	Larry	2004-11-23 05:53:02
re: Completely Analytical Solution (Physics + Differential Calculus)	Charlie	2004-11-23 05:04:17
re: Completely Analytical Solution (Physics + Differential Calculus)	Larry	2004-11-23 03:45:55
part 2 numerical solution	Charlie	2004-11-23 02:33:03
re: If This Was Earth	Charlie	2004-11-23 01:41:03
If This Was Earth	CeeAnne	2004-11-23 00:28:37
re(2): part 1: another method; another answer (wrong assumption)	Charlie	2004-11-23 00:06:41
re: part 1: another method; another answer (wrong assumption)	np_rt	2004-11-22 23:24:06
part 1: another method; another answer	Charlie	2004-11-22 22:55:03
part 1: different answer	Charlie	2004-11-22 20:31:17
Completely Analytical Solution (Physics + Differential Calculus)	np_rt	2004-11-22 19:35:07
re: too hard	RandyOrton	2004-11-22 18:47:18
too hard	Danny	2004-11-22 18:24:39

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