1.

A body of 5 kg hangs from a spring and oscillates with a time period of 2pi s. If the body is removed, the length of thespring will decrease by :

Answer»

`(k)/(g)` meter
g metre
`(g)/(k)` metre
none of these.

Solution :`T=2pi sqrt((m)/(k))`
`:.""2pi=2pi sqrt((5)/(k))`
`implies""k=5" NM"^(-1)`.
Now F = KL.
`implies""L=(F)/(k)=(5xx8)/(5)`
l = g metre.
Hence CORRECT choice is (b).


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