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Re: [Phys-l] Interactive Physics Question

Thanks, John. I will try that. A physical example would be a "relay" race
situation when one runner starts moving at almost constant speed when the
other runner reaches a certain point in the race.

-----Original Message-----
From: phys-l-bounces@carnot.physics.buffalo.edu
[mailto:phys-l-bounces@carnot.physics.buffalo.edu] On Behalf Of John Denker
Sent: Thursday, October 18, 2007 9:51 AM
To: Forum for Physics Educators
Subject: Re: [Phys-l] Interactive Physics Question

On 10/18/2007 09:39 AM, Ron Curtin asked:
.... how
to make it begin moving at a constant speed at any time other than the
start
of the simulation. Does anyone out there know how to do that?

Brief, reeeally large acceleration at the appointed time.

Note that a discontinuous change in velocity is unphysical.
Therefore we shouldn't be surprised that it is hard to model.
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