You’re an accident investigator at a scene where a drunk driver in a 2200 kg car has plowed into a 1400 kg parked car with its brake set. You measure skid marks showing that the combined wreckage moved 20 m before stopping, and you determine a frictional coefficient of 0.78. What do you report for the drunk driver’s speed just before the collision?

Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter11: Collisions
Section: Chapter Questions
Problem 9PQ
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You’re an accident investigator at a scene where a drunk driver in a 2200 kg car has plowed into a 1400 kg parked car with its brake set. You measure skid marks showing that the combined wreckage moved 20 m before stopping, and you determine a frictional coefficient of 0.78. What do you report for the drunk driver’s speed just before the collision?

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