All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Science
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: ( You must be logged in to post comments.)
  Subject Author Date
Further to AndyJohn2005-12-27 08:58:14
No SubjectBrandon2005-05-16 13:50:30
ummm..nilshady2005-05-13 06:26:28
Correct solutionAndy2005-05-07 18:49:41
Some Thoughts...Wayne2005-03-23 02:19:55
QuestionNo SubjectNikkie Byars2005-03-23 01:40:43
re: My memories from schoolajosin2005-03-02 21:48:24
My memories from schoolBrian Wainscott2004-11-23 20:15:57
No Subjectnp_rt2004-11-23 19:46:10
re(2): Completely Analytical Solution (Physics + Differential Calculus)Larry2004-11-23 05:53:02
re: Completely Analytical Solution (Physics + Differential Calculus)Charlie2004-11-23 05:04:17
re: Completely Analytical Solution (Physics + Differential Calculus)Larry2004-11-23 03:45:55
Solutionpart 2 numerical solutionCharlie2004-11-23 02:33:03
re: If This Was EarthCharlie2004-11-23 01:41:03
Some ThoughtsIf This Was EarthCeeAnne2004-11-23 00:28:37
Solutionre(2): part 1: another method; another answer (wrong assumption)Charlie2004-11-23 00:06:41
re: part 1: another method; another answer (wrong assumption)np_rt2004-11-22 23:24:06
part 1: another method; another answerCharlie2004-11-22 22:55:03
part 1: different answerCharlie2004-11-22 20:31:17
Completely Analytical Solution (Physics + Differential Calculus)np_rt2004-11-22 19:35:07
re: too hardRandyOrton2004-11-22 18:47:18
Some Thoughtstoo hardDanny2004-11-22 18:24:39
Please log in:
Login:
Password:
Remember me:
Sign up! | Forgot password


Search:
Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (2)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2017 by Animus Pactum Consulting. All rights reserved. Privacy Information