Essential University Physics
4th Edition
ISBN: 9780134988559
Author: Wolfson, Richard
Publisher: Pearson Education,
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Textbook Question
Chapter 4, Problem 59P
You’re an automotive engineer designing the “crumple zone” of a new car—the region that compresses as the car comes to a stop in a head-on collision. If the maximum allowable force on a passenger in a 70-km/h collision is 20 times the passenger’s weight, what do you specify for the amount of compression in the crumple /one?
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with their wheels locked for 18.5 ft before stopping. You have measured the coefficient of kinetic friction between the tires and
the pavement to be 0.750.
What speed (in miles per hour) was car A traveling just
before the collision? (This problem uses English units
because they would be used in a U.S. legal proceeding.)
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You have been called to testify as an expert witness in a trial involving a head-on collision. Car A weighs 1515 lb and was traveling eastward. Car B weighs 1125 lb and was traveling westward at 43.0 mph. The cars locked bumpers and slid eastward with their wheels locked for 17.5 ft before stopping. You have measured the coefficient of kinetic friction between the tires and the pavement to be 0.750.
What speed v (in miles per hour) was car A traveling just before the collision? (This problem uses English units because they would be used in a U.S. legal proceeding.)
Chapter 4 Solutions
Essential University Physics
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