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NEET 2004 (AIPMT) · Spring Systems

Spring Systems question from NEET 2004 (AIPMT)

Q92NEET 2004 · AIPMTEasy

Spring Systems

Two springs of spring constants k1 and k2 are joined in series. The effective spring constant of the combination is given by

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Answer: (d)

In series the same force $F$ acts on both springs and the extensions add: $\frac{F}{k} = \frac{F}{k_1} + \frac{F}{k_2}$ .
$\frac{1}{k} = \frac{1}{k_1} + \frac{1}{k_2} \Rightarrow k = \frac{k_1k_2}{k_1+k_2}$
So the answer is (d).

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