Amass m is attached to horizontal spring force constant k fixed one side to rigid support as shown in fig the mass oscillates in frictionless surface with time period t and amplitude a . when the mass is in equilibrium position another mass m is gently placed on it. what will be the new period of oscillation?
option (a)2pi root (m+m/k) (c)2pi root (m+m/2k)
(b) 2pi root (m-m/k) (d)2pi root (m-m/2k)
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