> Repeating this process > many times would also generate heat. This prediction alone should make you realize there is something fishy in your hypothesis.
I'll try one last thing to help you out of this heresy, 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? Michel ----- Original Message ----- From: "Harry Veeder" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, July 31, 2007 9:28 PM Subject: Re: [Vo]:Re: The Earth and the Wheel > > >>>> MJ: >>>> >>>> Then look at your own drawing, which is correct, do you observe a rotation >>>> of >>>> the wheel _wrt its hub_? >>> >>> HV: >>> I observe the Sun going around the Earth and can represent this observation >>> with a drawing. However the drawing does not prove that the Earth is not >>> revolving about the Sun. >> >> MJ: >> But you can assert that the Sun and the Earth have a _relative_ motion can't >> you? > > Yes, but my point was that a model of a motion is just a model of a motion, > it is not the motion itself. > >>> HV: >>> Similarly, the Earth-wheel drawing does not prove >>> that the wheel is not rotating wrt to its hub. >> >> MJ: >> It is however clear that there is no _relative_ motion of the wheel wrt its >> hub. If you make pencil marks they will stay aligned. > > Yes, but I would prefer to state it this way: > there is no _indication_ of motion of the wheel wrt its hub when the pencil > mark test is used. (This test can be done on the actual wheel too.) > >>>> MJ: >>>> About your other experiment with a turntable if you want to draw >>>> conclusions >>>> wrt the Earth-wheel system don't forget the turntable should be rotating at >>>> _constant angular velocity_ both BEFORE and AFTER the brake is released, >>>> like >>>> the Earth in the Earth-wheel system. This is not what you said you did ("if >>>> I >>>> swivel the turntable 90 (or by any amount) _after_ the brake is released") >>> >>> HV: >>> A non-rotating turntable wrt to the ground has a constant angular >>> velocity of zero so I don't see why your particular conditions >>> are essential. >> >> MJ: >> Zero is fine by me, it's indeed constant, but then why use a turntable if >> it's >> not for rotating it? > > As a test of my prediction. > >> Besides you have lost me with that turntable digression, let's refocus on the >> original Earth and wheel system shall we? Do you still contend something >> (spoke tension?) will change after you release the brake from your original >> wheel on the Earth's equator? >> >> Before you answer, ask yourself, will it change again when you re-apply the >> brake? And then again when you re-release it? >> > > > Yes, the tension will vanish and then reappear. BTW a change in tension > might be easier to detect in the rim of the wheel. Repeating this process > many times would also generate heat. > > Harry >
