Re: [Phys-l] [PTSOS] anvil and sledgehammer inertia demo

["John Clement" <clement@hal-pc.org>]

But there is no evidence of balanced forces when something is in uniform
motion, so it is not the same.

John M. Clement
Houston, TX

> -----Original Message-----
> From: phys-l-bounces@carnot.physics.buffalo.edu [mailto:phys-l-
> bounces@carnot.physics.buffalo.edu] On Behalf Of John Denker
> Sent: Wednesday, September 29, 2010 3:21 PM
> To: Forum for Physics Educators
> Subject: Re: [Phys-l] [PTSOS] anvil and sledgehammer inertia demo
>
> On 09/29/2010 03:15 PM, Stefan Jeglinski wrote:
> > > The really important demo is to show that a moving object
> > > with balanced forces remains in constant motion.
>
> > I substantially agree. What are your favorite demos of this, suitable
> > for a classroom?
>
> In addition to the other suggestions:  Keep in mind that
> this point is intimately connected to Galileo's principle
> of relativity, so that all the usual relativity demos
> can be used ... e.g. juggling where the juggler is in
> uniform motion relative to the observer.  There are
> innumerable variations on this, some involving air
> tracks.
> _______________________________________________
> Forum for Physics Educators
> Phys-l@carnot.physics.buffalo.edu
> https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l