Or more likely that braking a null relative motion makes no difference at all, but I give up trying to convince you :)
I have found this thought experiment of yours quite interesting nevertheless, it's fascinating that a wheel only looks as if it stays still when you release its brake, whereas it is in fact continuing a rotation imparted by the Earth's spin, surely not many people realize that! Michel ----- Original Message ----- From: "Harry Veeder" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Wednesday, August 01, 2007 10:03 PM Subject: Re: [Vo]:Re: The Earth and the Wheel > On 31/7/2007 6:40 PM, Michel Jullian wrote: > > >> I'll try one last thing to help you out of this heresy, > > I would prefer if you characterised it as unorthodox rather than as > heretical. > >> imagine that the brake >> consists in sliding a two prong fork over one of the spokes, with the prongs >> infinitely close to the spoke but _NOT touching it_. With the brake as >> specified, would you still expect a tension to change somewhere in the wheel >> when you slide the fork in and out? > > > I wouldn't expect it, but your example only shows that a touching brake > is essential. > > > Harry > >
