On 12/09/2012 08:41, Tim Lamb wrote:
In message
,
harry writes
On Sep 11, 9:47 pm, Bill Wright wrote:
The Natural Philosopher wrote:
not at the pint of contact.

Only an infinitely hard wheel on an infinitely hard road would waste no
energy on deforming the road or the wheel.

Bill


But then the pressure would be infinite and the contact area zero, so
where does that leave you?

On a railway?

Nope. Even steel wheels on steel rails deform as they rotate, just not
very much.

SteveW