On 23/06/18 12:48, AnthonyL wrote:
From my distant past of mechanics of motion the centre of rotation of
a wheel is its point of contact with the ground and the rotating
radius/diameter will be less the more the tyre is squashed. Beyond
that and trying to find my books I cannot clarify other than it worked
in getting my degree.

Before some of you roll your eyes think about it, if the centre of
rotation was anywhere else the tyre would be scrubbing. The point of
contact is instantaneously stationary.


Pretty irrelevant. The centre of rotation is actually on a planet in a
far distant galaxy.

I refer you to :


http://vps.templar.co.uk/Cartoons%20...ugal_force.png



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"Socialist governments traditionally do make a financial mess. They
always run out of other people's money. It's quite a characteristic of them"

Margaret Thatcher