A) 48 kg
B) 36 kg
C) 24kg
D) 12kg
Correct Answer: B
Solution :
Let spring constant of each spring be k, then the equivalent spring constant of two spring system is parallel is\[2k\]. Without mass, time period \[T=3s=2\pi \sqrt{\frac{12}{2k}}\] with mass, \[T=6s=2\pi \sqrt{\frac{12+m}{2k}}\] \[\frac{T}{T}=\frac{1}{2}=\sqrt{\frac{12}{12+m}}\] \[\Rightarrow \] \[m=36kg\]You need to login to perform this action.
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