Question: Prove Eq. (1040). Hint: Using Castiglianos theorem, determine the deflection due to bending of an end hook alone as if the hook were fixed at

Prove Eq. (10–40). Hint: Using Castigliano’s theorem, determine the deflection due to bending of an end hook alone as if the hook were fixed at the end connecting it to the body of the spring. Consider the wire diameter d small as compared to the mean radius of the hook, R = D/2. Add the deflections of the end hooks to the deflection of the main body to determine the final spring constant, then equate it to Eq. (10–9).

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