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Question:

How can I test the stiffness of the springs for the suspension system of a car?

I know nothing about cars but I have a Physics lab on the topic. I think it‘s quite clear that the question wants me to use Hooke‘s law to determine the spring constant of the suspension system; the problem is that I have no clue how to go about it. Any suggestions?

Answer:

Kev, Without disassembling the car, the only practical way to test the stiffness is to apply a weight w at each corner (preferably right over the tire) and measure the downward deflection d. Then, at each location, k w/d and the total k for the whole car would be K 4w/(Σd) In this case the 'suspension system' includes the tires as well as the springs shock absorbers.

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