Two identical springs of constant.k are connected in series and parallel as shown in fig. {g). A mass m is suspended from them. The ratio of their frequencies of vertical oscillations will be
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a
2 :1
b
1:1
c
1:2
d
4:1
answer is C.
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Detailed Solution
n=12πkm In series k=k1k2k1+k2=k⋅k2k=k2 in parallel k=k1+k2=2k n1=12πk2m and n2=12π2km