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Old 14th January 2009, 09:53 AM   #1238
Join Date: Dec 2007
Posts: 5,928
Originally Posted by RossFW View Post
Quoted because it's just so,well, so HUMBER!!!

Humber, you realise that if I walk past the cart while it is motionless relative to the ground, and therefore has a relative velocity to me,that the cart is in motion relative to MY frame of reference?

No, sorry, of course you don't.....
That means nothing, RossFW
The treadmill has no ground equivalent. This means that the belt is not the road, but the Earth. This is because the windspeed status must be forced upon the observer. That means the belt is also a privileged and unique perspective. If not then the treadmill collapses to the real world equivalent of a real treadmill, with different objects at different velocities in the same frame. Either way, no motion.
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