1.

In the figure all spring are indentical having spring constant `k` and mass `m` each Th eblock also mass `m` The frequency of oscilation of the block is A. `(1)/(2pi)sqrt((3k)/(m))`B. `(1)/(2pi)sqrt((3k)/(2m))`C. `2pi sqrt((3m)/(3k))`D. None of these

Answer» Correct Answer - B
If spring has the mass thebn
`f = (1)/(2pi) sqrt((k)/(m +(M_("spring"))/(3))`
spring equivalent `= 3k` (As all are in perallel)
`f = (1)/(2pi) sqrt((2k)/(m +((3m))/(3))` rArr `f = (1)/(2pi)sqrt((3k)/(2m))`


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