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

Home > Science
Two Rolling Balls (Posted on 2009-11-04) Difficulty: 3 of 5
Two identical balls roll across the top of a table on parallel paths. One of the balls has to roll down into and up out of a dip in the table. The other ball rolls on the flat all the time. Which ball gets to the far side of the table first, and why?.

No Solution Yet Submitted by Brian Smith    
Rating: 3.5000 (4 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
P | Comment 1 of 21
If the tabletop is flat, we must add a condition that the balls are set in motion by identical forces.  We must ignore friction, since not specified.  We must also assume the "dip" is not so great that the ball encountering it cannot climb the other side (perhaps that is implied by problem statement).  In these cases I think the ball going thru the dip will arrive first (same horizontal distance but greater average speed with the dip).  Perhaps other variables need to be specified or assumed.
  Posted by ed bottemiller on 2009-11-04 13:28:32
Please log in:
Remember me:
Sign up! | Forgot password

Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (1)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Copyright © 2002 - 2019 by Animus Pactum Consulting. All rights reserved. Privacy Information