UnThreaded | Threaded | Whole Thread (2) | Ignore Thread Prev Thread | Prev | Next | Next Thread
Author: splotto Big gold star, 5000 posts Old School Fool Add to my Favorite Fools Ignore this person (you won't see their posts anymore) Number: of 242  
Subject: Re: Anti-grav - or bend a rod... Date: 3/1/2004 3:33 PM
Post New | Post Reply | Reply Later | Create Poll . Report this Post | Recommend it!
Recommendations: 0
when moving a rotating mass about it's rotating axix, the force is realized 90 degrees in the direction of rotation, right?

The angular velocity/angular acceleration vector points at 90 degrees from the radial line to the center of rotation.

so if i have a mass spinning "toward" from me, push one end of the axel "forward" or away from me, that end should tend to move up, right?

If I understand your question my answer is no. The force acting on the rotating object (like a string connectiong the ball to the rod represenative of the gravitational force) would not be altered by the simple rotation of the rod about the connection point (which represents the center of gravity of the attracting object). Assuming the attrating object is homogeneous and that the gravitational force doesn't alter with the rotation, then the force still moves from the center of the ball to the connection point on the rod.

In a imperfect system like a lab, the string would actually twist and exert a force on the ball as it deforms and returns during the twist. This would cause the ball the turn and deflect from it's original path purely from the error in the model. If you have a true force or a connection medium that could deflect without recovering, then the error would not appear.

Splotto
Post New | Post Reply | Reply Later | Create Poll . Report this Post | Recommend it!
Print the post  
UnThreaded | Threaded | Whole Thread (2) | Ignore Thread Prev Thread | Prev | Next | Next Thread

Announcements

2013 Feste Award Voting Begins!
Who will win the 2013 Feste Award? Vote now for the Fool that most exemplifies the Fool Community mission of Learning Together!
When Life Gives You Lemons
We all have had hardships and made poor decisions. The important thing is how we respond and grow. Read the story of a Fool who started from nothing, and looks to gain everything.
Post of the Day:
Tax Strategies

TMFPMarti-Feeling Good
What was Your Dumbest Investment?
Share it with us -- and learn from others' stories of flubs.
Community Home
Speak Your Mind, Start Your Blog, Rate Your Stocks

Community Team Fools - who are those TMF's?
Contact Us
Contact Customer Service and other Fool departments here.
Work for Fools?
Winner of the Washingtonian great places to work, and "#1 Media Company to Work For" (BusinessInsider 2011)! Have access to all of TMF's online and email products for FREE, and be paid for your contributions to TMF! Click the link and start your Fool career.
Advertisement