Find the elastic potential energy stored in each spring shown in figure, when the block is in equilibrium. Also find the time period of vertical oscillation of the block.
k1,k2,k3 are in series,
Time period T=2π√=2π√=2π√
∴ At k1 spring,x1=mgk1
Similarly x2=mgk2 and x3=mgk3
Similarly PE2=m2g22k2 and PE3=m2g22k3