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Question

For the arrangement shown in the figure. Find the frequency of oscillation.


A
5 Hz
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B
3 Hz
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C
3.9 Hz
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D
1.9 Hz
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Solution

The correct option is C 3.9 Hz
Given,
Force constant of spring 1 (K1)=300 N/m
Force constant of spring 2 (K2)=600 N/m
Mass of block (m)=1.5 kg
Effective spring constant (K)=K1+K2
=900 N/m
Frequency of oscillation (F)=12πKm
=12π9001.5
=3.9 Hz

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