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Figure shows two cases. In first case a spring (spring constant \( K \) ) is pulled by two equal and opposite forces
\( \mathrm{P} \) \( F \) at both ends and in second case is pulled by a force \( \mathrm{F} \) at one end. Extensions \( (x) \) in the spring will be
W
(1) In both cases \( x=\frac{2 F}{K} \)
(2) In both cases \( x=\frac{F}{K} \)
(3) In first case \( x=\frac{2 F}{K} \), in second case \( x=\frac{F}{K} \)
(4) In first case \( x=\frac{F}{K} \), in second case \( x=\frac{2 F}{K} \)
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