What will be the force constant of the spring system shown in the figure?

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[1k1+1k2]

[12k1+1k2]-1

[1k1+1k2]-1

[12k1+1k2]

answer is B.

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Detailed Solution

For parallel combination of first two identical springs of spring constant k1, effective spring constantKp = 2k1Now, springs of spring constants kp and k2 are joined in series, so the force constant or the spring constant of the system is1KS = 1KP+1K2 = (12k1+1k2)-1

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