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Question

The frequency of oscillations of a mass m suspended by a spring is v1. If the length of the spring is cut to one-half, the same mass oscillates with frequency v2. The value v2v1 is:

A
2
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B
2
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C
4
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D
3
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Solution

The correct option is B 2
The frequency of oscillations of mass m and force constant k is, v1=12πkm
when the spring is cut to one-half of its length, its force constant is doubles (2k).
Then frequency of oscillation of mass m will be

v2=12π2km=v2v1=2`

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