A compression spring is made of music wire of 2 mm diameter having a shear strength and shear modulus of 800 Mpa and 80 Gpa respectively. The mean coil diameter is 20mm, free length is 40 mm, and the number of active coils is 10. If the mean coil diameter is reduced to 10 mm, the stiffness of the spring is approximately a. increased by 8 times b. decreased by 2 times c. increased by 2 times d. decreased by 8 times

A compression spring is made of music wire of 2 mm diameter having a shear strength and  shear modulus of 800 Mpa and 80 Gpa respectively. The mean coil diameter is 20mm, free  length is 40 mm, and the number of active coils is 10. If the mean coil diameter is reduced to 10  mm, the stiffness of the spring is approximately
a. increased by 8 times
b. decreased by 2 times
c. increased by 2 times
d. decreased by 8 times
by

1 Answer

Answer :

a. increased by 8 times
by

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