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What is the correct answer?
4
A composite shaft consisting of two stepped portions having spring constants K₁ and K₂ is held between two rigid supports at the ends. Its equivalent spring constant is
A.
K₁ K₂
B.
(K₁ + K₂)/ 2
C.
(K₁ + K₂)/ K₁ K₂
D.
K₁ K₂/ (K₁ + K₂)
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