1.

The deflection δ of the closed coil helical spring isWhere: W is the axial loadR is radius of the coiln is the number of turns of coilC is the modulus of rigidityd is the diameter of the wire of the coil

A. \(\frac{{W{R^2}n}}{{8C{d^3}}}\)
B. \(\frac{{64\;W{R^3}n}}{{C{d^4}}}\)
C. \(\frac{{128\;W{R^3}n}}{{C{d^2}}}\)
D. \(\frac{{64\;W{R^2}n}}{{C{d^2}}}\)
Answer» C. \(\frac{{128\;W{R^3}n}}{{C{d^2}}}\)


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