In the design of a spring bumper for a 3500-lb car, it is desired to bring the car to a stop from a speed of 5 mi/hr in a distance equal to 6 in. of spring de- formation. Specify the required stiffness k for each of the two springs behind the bumper. The springs are undeformed at the start of impact.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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3/101 In the design of a spring bumper for a 3500-lb car,
it is desired to bring the car to a stop from a speed
of 5 mi/hr in a distance equal to 6 in. of spring de-
formation. Specify the required stiffness k for each
of the two springs behind the bumper. The springs
are undeformed at the start of impact.
5 mi/hr
Problem 3/101
Transcribed Image Text:3/101 In the design of a spring bumper for a 3500-lb car, it is desired to bring the car to a stop from a speed of 5 mi/hr in a distance equal to 6 in. of spring de- formation. Specify the required stiffness k for each of the two springs behind the bumper. The springs are undeformed at the start of impact. 5 mi/hr Problem 3/101
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