The purpose of this informal working note is to document the derivation of an equation that determines the acceleration of a moving object when given its time of arrival at three known points. This equation can be used to approximate the acceleration of a rolling rail car in a hump yard. This acceleration in turn gives an indication of rolling resistance.
Research was conducted to collect speed, time, and distance data for Type C and D (full size) school buses accelerating from a stopped position. Most ...
In a previous study (Analysis of VASCAR, DOT HS 807-748, May 1993), it was found that the VASCAR-plus timing mechanism was biased against the speed li...
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