While you stay with the turntable the Newtonian force pair is:
1) an inward force on you from the table (friction),
2) an outward force by you on the table (friction)
There is a net inward (centripetal) force on you and you accelerate
inwards. Note there is no outward force on you by anything.
When you "let go" there is no interaction between you and the table. You
proceed in a straight line at constant velocity as observed from the
ground. An observer left behind on the rotating platform will see you
centrifugally accelerate outward - because of his inward acceleration and
rotating coordinate system.
Bob Sciamanda (W3NLV)
Physics, Edinboro Univ of PA (em)
trebor@velocity.net http://www.velocity.net/~trebor
----- Original Message -----
From: "Clarence Bennett" <bennett@OAKLAND.EDU>
To: <PHYS-L@lists.nau.edu>
Sent: Friday, December 13, 2002 12:05 PM
Subject: Re: centrifugal force (cont)
| When I'm on the turntable, I seem to feel a centrifugal force only as
| long as I also experience centripetal friction holding me.
| If I let go, I no longer feel either.
|
| Isn't that a Newtonian pair?
| --
| Clarence Bennett
| Oakland University
| Rochester, Michigan
| 248 370 3418