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Question

# For the system shown in the given figure, the surface on which the blocks are placed is smooth. If the two blocks are displaced by small amount, then determine the time period of oscillation of resulting motion of two blocks.

A
2π3m7k
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B
2π7m2k
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C
3πm7k
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D
2π3m4k
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Solution

## The correct option is C 3π√m7kThe given system can be redrawn as The above simplification has been done by using series and parallel combinations of springs and the reduced mass concept. In series, 1Keq=1K1+1K2, In parallel, Keq=K1+K2, Reduced mass, μ=m1m2m1+m2 Required time period, T=2π√μKeq=3π√m7k.

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