A closely coiled helical spring of 20 cm mean diameter is having 25 coils of 2 cm diameter rod. The modulus of rigidity of the material is 107 N/cm2. What is the stiffness for the spring in N/cm?

A closely coiled helical spring of 20 cm mean diameter is having 25 co

1.	A closely coiled helical spring of 20 cm mean diameter is having 25 coils of 2 cm diameter rod. The modulus of rigidity of the material is 107 N/cm2. What is the stiffness for the spring in N/cm?
A.	50
B.	100
C.	250
D.	500
Answer» C. 250

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A closely coiled helical spring of 20 cm mean diameter is having 25 coils of 2 cm diameter rod. The modulus of rigidity of the material is 107 N/cm2. What is the stiffness for the spring in N/cm?

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