The formula T/J = NO/L = fs/r when applied to torsion of closely coiled helical spring, the value of J will be calculated with Options: A . &nbspmean diameter of the coil D B . &nbspthe diameter of wire of spring C . &nbspmean of D and d D . &nbsp(2D + d)3

The formula T/J = NO/L = fs/r when applied to torsion of closely coiled helical

Question

The formula T/J = NO/L = fs/r when applied to torsion of closely coiled helical spring, the value of J will be calculated with

Options:

A . mean diameter of the coil D

B . the diameter of wire of spring

C . mean of D and d

D . (2D + d)3

Answer: Option B

the diameter of wire of spring

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