Physics-
General
Easy
Question
Four massless springs whose force constants are 2k, 2k, k and 2k respectively are attached to a mass M kept on a frictionless plane (as shown in figure). If the mass M is displaced in the horizontal direction, then the frequency of oscillation of the system is

The correct answer is: 
The two springs on left side having spring constant of 2k each are in series, equivalent constant is
. The two springs on right hand side of mass M are in parallel. Their effective spring constant is
.
Equivalent spring constants of value k and 3k are in parallel and their net value of spring constant of all the four springs is 
Frequency of mass is 
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