One everyday example of a weak spring is the spring found in your bail-point pen

Question

One everyday example of a weak spring is the spring found in your bail-point pen. A typical pen spring will be compressed by about 1 millimeter when it supports about 5 grams of mass. Which of the following values is closest to the force constant of a typical bail-point pen spring? Examples of much stiffer springs include the coil springs used in a car's suspension system, to support the weight of the vehicle body. Typically it takes about 300 pounds to compress such springs by 1 inch. Which of the following most closely describes the force constant of a coil spring for a car?

Explanation / Answer

a) K= mg/x = 50 N/m
b) 50000 N/m

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