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A mass m is suspended from a two coupled springs, connected in series. The force constant for springs are k1 and k2. The time period of the suspended mass will be
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T = 2π 
m k1 - k2 -
T = 2π mk1 k2 k1 + k2 -
T = 2π m k1 + k2 -
T = 2π m(k1 + k2) k1 k2
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Correct Option: D
| The effective spring constant of two springs in series; K = | ||
| k1 + k2 |
| Time period, T = 2π | |  | = 2π | | |
| K | k1 k2 |
