Re: Kinematics Tutorials

[Bob Sciamanda <trebor@VELOCITY.NET>]

Perhaps you might add the observation that

1) a motion having Vo and a of like signs will be unidirectional and will
forever speed up ;

2) a motion with Vo and a of opposite signs will slow down, turn around,
and forever thereafter speed up.

Bob Sciamanda (W3NLV)
Physics, Edinboro Univ of PA (em)
trebor@velocity.net
http://www.velocity.net/~trebor

----- Original Message -----
From: "Bob Sciamanda" <trebor@VELOCITY.NET>
To: <PHYS-L@lists.nau.edu>
Sent: Tuesday, May 23, 2000 2:40 PM
Subject: Re: Kinematics Tutorials


> An excellent learning aid!
>
> Just a semantic nit-pick (may be a serious confusion to some students):
>
> A motion like Vo = 10; a = -5 is described as an object slowing down
while
> moving in the positive direction.  The student will notice that this is
a
> correct description only of the first 2 seconds of the motion -
thereafter
> it is speeding up while moving in the negative direction.
>
> Bob
>
> Bob Sciamanda (W3NLV)
> Physics, Edinboro Univ of PA (em)
> trebor@velocity.net
> http://www.velocity.net/~trebor