The Traffic Accident Reconstruction Origin -ARnews-
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The Traffic Accident Reconstruction Origin -ARnews-
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I am interested in your comment that the coefficient of friction is velocity dependent.
I know that Northwestern Traffic Institute believes that it is higher for velocities under 30 m/h than for velocities over thirty m/h.
Unfortunately testing that I have done does not reveal these predicted differences.
As a matter of fact all physics books that I have reviewed state the opposite.
The three rules for coefficient of friction are as follows:
1) f is weight independent
2) f is surface area independent
3) f is velocity independent
I respect N.U.T.I. and there methods of teaching
however I have never been able to reconcile this problem.
If you have an explanation please e-mail me.
By the way I utilize the vc2000-pc and I am satisfied with it's accuracy.
I have also used my home made drag tire and I am satisfied
that the two are close enough in their results when properly used.
If anything the tire is usually slightly lower in its readings.
I am convinced that when skid tests are conducted time is the best
way to determine the coefficient of friction.
I look forward to your comments.
Mike
Michael Sunseri
leveerat@ix.netcom.com
For example, to continue this discussion look for a thread titled
Vericom VC2000
If this thread does not exist in the current archive, you can begin another one by using that title.