
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
January 15th, 2008, 09:42 AM  #1 
Newbie Joined: Jan 2008 Posts: 13 Thanks: 0  I'm scratching my head
I'm new to this forum, so don't know step one in getting a diagram, so if somebody can respond to that, and THEN, let me try to explain this math problem in generic words. I have two wheels spaced 7.0 feet apart. The wheel on the left is 10 inches in diameter and the one on the right is 15 inches in diameter. There is a linkage, a bar that is attached to the left wheel on it's RIGHT HAND EDGE, and this same bar/linkage is attached to the RIGHT wheel at it's TOP. The wheel hubs are located vertically such that the bar/linkage is HORIZONTAL; that is the Left hand wheel hub is at the same altitude of the TOP OF THE RIGHT HAND WHEEL. so if I stated this correctly, the length of the bar/linkage is 7 feet [84.0 inches MINUS the radius of the left wheel, which is 5 inches, so the bar should be 79 inches long]. I am only interested in the left hand wheel rotating 90 degrees in the CW direction, and the right hand wheel "following" it. Now, if I described this problem correctly w/o any math errors, ha, my question is NOT, the relationship between the left hand turning degrees vs the right hand wheel resulting turn, [I CAN determine it], but the question is: Can this be solved mathematically w/o resorting to "guessing" the answers and substitution to see if all geometry "works out"? I cannot seem to DO it mathematically. Puzzled. LarryR : ) 
January 15th, 2008, 10:54 PM  #2 
Newbie Joined: Jan 2008 Posts: 13 Thanks: 0  I got it
I guess posting it got me MORE intrigued, and I HAD to solve it. So I DID It requires only Algebra 101 and Trig 101, but IT IS TEDIOUS. Phew.......... try it someime when you're bored. LarryR : ) 

Tags 
head, scratching 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Can't get my head around this asset allocation formula  DeathRobot  Economics  1  December 15th, 2013 01:53 AM 
Calculate cubic roots, weekdays etc in your head !  KingOfMnemonics  New Users  0  January 7th, 2013 01:39 PM 
Hello everyone, I am in over my head.  cr12678  New Users  3  December 11th, 2011 11:01 AM 
PB268, Head Bear at PolarBearGames  PB268  New Users  4  October 1st, 2010 10:05 AM 