A particle of the end of a spring executes simple harmonic motion with a period t1. While the corresponding period for another spring is t2. If the period of oscillation with the two springs in series is T, then
T = t1 + t2
T2 = t12 + t22
T-1 = t1-1 + t2-1
T-2 = t1-2 + t2-2
Option 1)
T = t1 + t2
Option 2)
T2 = t12 + t22
Option 3)
T-1 = t1-1 + t2-1
Option 4)
T-2 = t1-2 + t2-2
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