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At the beginning of the skid, the delta v between the
locked tire and the road is greatest. Thus, I think
the darkest area is at the start of the skid. Also, if
you inspect the tire tracks of a car that has "peeled
out" from a standing start, the tracks are darkest at
the start of the "peel", not at the end. Again,
greater delta v seems to be associated with darkness.
John Barrere
--- "Fakhruddin, Hasanbhai" <hfakhrud@BSU.EDU> wrote:
A tire mark on a road due to hard braking is dark at
one end and fade=
s
out at the other. Which way was the vehicle moving
when the brakes w=
ere
slammed? =20
This morning I wondered when I saw such marks.
Hasan Fakhruddin
Instructor of Physics
The Indiana Academy for Science, Mathematics, and
Humanities
BSU
Muncie, IN 47306
E-mail: hfakhrud@bsu.edu
This posting is the position of the writer, not that
of SUNY-BSC, NAU or the AAPT.
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This posting is the position of the writer, not that of SUNY-BSC, NAU or the AAPT.