learn something new everyday, and its making my head hurt Options

[brer]

So last night we were working on rotational motion and all i could think about was the crank in my motor and my car going around a corner..
anyone want to help explain this to me?


An object spinning at a constant speed has less acceleration at each consecutive point as you move further out from the center.
acceleration being related to the radius of the rotational orbit and the constant change in directional velocity.


Makes me car sick just thinking about it.

(IMG:http://www.914world.com/bbs2/html/emoticons/barf.gif)

[ArtechnikA]

QUOTE (brer @ Aug 19 2005, 04:06 PM)

anyone want to help explain this to me? An object spinning at a constant speed has less acceleration at each consecutive point as you move further out from the center. acceleration being related to the radius of the rotational orbit and the constant change in directional velocity.

so what part of that is not clear to you? you explained it perfectly.

look at it this way:

picture a big turntable - like a record player (what are those?) or a playground carousel.

put an accelerometer 1' away from the center. it will show an acceleration vector toward the rotational center. because its angular velocity is large, it will show a large acceleration.

move the accelerometer out 30'. the acceleration vector still points in, but the angular change is smaller, and will show a smaller acceleration.

at infinity, the outer edge of the spinning disk is going in a straight line :-)