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Unread 03-02-2012, 23:28
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Re: Top/bottom roller shooter vs. bottom roller only

Quote:
Originally Posted by Ether View Post
Think about the tire of a car going down the highway at 60mph.

At any instant in time, the center of the tire is translating at 60 mph. The bottom of the tire, touching the ground, has zero speed at that instant. The top of the tire, at that instant in time, is going 120mph.

We are talking about an observation in the road's frame of reference?
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