Drivers of a car and a van brake hard and skid to a stop from 50 mph. The skid marks are measured to be the same length for both vehicles. Why are the stopping distances the same length?
A. The mechanical work done by friction to stop both is the same.
B. As long as they stopped from the same speed two cars should slide the same length.
C. The frictional force for the car and the van are the same.
D. The wider tires on the van require less friction force than the narrow tires on the car.
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Exam Details
This exam will cover some concepts necessary to master for the Physical Sciences portion of the MCAT exam.
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Added: 6/28/2008
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