You are correct! In free fall a = -g for the entire flight.
Bob Sciamanda
Physics, Edinboro Univ of PA (Em) http://www.winbeam.com/~trebor/
trebor@winbeam.com
----- Original Message -----
From: "Clarence Bennett" <bennett@OAKLAND.EDU>
To: <PHYS-L@LISTS.NAU.EDU>
Sent: Thursday, November 03, 2005 11:22 AM
Subject: Re: A problem of motion and derivatives
| >
| > > Seth wrote:
| >
| > > But at t=20, the velocity, the acceleration and the jerk are ALL
zero!
|
| I think this is a common, incorrect assumption, that the
| acceleration is zero at the top, just because it looks like it
| stops moving and turns around, but the acceleration is approxomately
| -g all the way.
|
| Am I right?
| --
|
|
|
| Clarence Bennett
| Oakland University Physics
| Rochester, Michigan
| 248 370 3418
| 248 377 4048
|
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