- The spring constant (k) quantifies the stiffness of a spring. - For a helical spring, the spring constant is given by the formula k = (G d⁴) / (8 D³ n), where G is the shear modulus of the material, d is the wire diameter (thickness), D is the coil diameter, and n is the number of active turns (related to length). - Therefore, k depends on the material (shear modulus G), the wire thickness (d), the coil diameter (D), and the number of turns (n, which determines the overall length for a given coil diameter and pitch). - Option D includes thickness (wire diameter), diameter (coil diameter), and material, which are the key determinants of the spring constant.
The spring constant of a spring depends on its
Asked in UPSC CDS 2 2016 · Topic: Physical Properties of Materials (Elasticity and Plasticity)
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Answer: D. thickness, its diameter and its material
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