The springs shown are identical. When A=4kg , the elongation of spring is 1 cm. If B=6kg, the elongation produced by it is

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4 cm

3 cm

2 cm

1 cm

answer is B.

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Detailed Solution

F=kx⇒mg=kx⇒m∝kxHence m1m2=k1k2×x1x2⇒46=kk/2×1x2⇒x2=3 cm.

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