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Strength of Materials

Springs in Series and Parallel

The spring co...

Question

The spring constant of a helical compression spring DOES NOT depend on

A

Coil diameter

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B

material strength

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C

number of active turns

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D

wire diameter

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Solution

The correct option is B material strength
Stiffness of helical spring,
$k = \frac{G d^{4}}{64 R^{3} n}$
It depends on wire diameter on wire diameter (d), shear modulus (G), Coil radius (R) and number of active turns (n). Does not depend on strength.

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