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Q.

A mass m is attached to two strings as shown in figure.  The spring constants of two springs are K1 and K2. For the frictionless surface, the time period of oscillation of mass m is 

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a

12πK1+K2m

b

2πmK1+K2

c

2πmK1K2

d

12πK1K2m

answer is B.

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Detailed Solution

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Time period  =2πmK

In the figure K1 & K2 are parallel

So, Keff=K1+K2

T=2πmK1+K2

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