Two identical springs are attached to a small block P. The other ends of the springs are fixed at A and B. When P is in equilibrium the extension of top spring is 20 cm and extension of bottom spring is 10 cm. The period of small vertical oscillations of P about its equilibrium position is (use g = 9.8 m/ s 2 ) a . 2 π 7 s e c b . π 7 s e c c . 2 π 5 s e c d . n o n e o f t h e s e Two identical springs are attached to a small block P. The other ends of the springs are fixed at A and B. When P is in equilibrium the extension of top spring is 20 cm and extension of bottom spring is 10 cm. The period of small vertical oscillations of P about its equilibrium position is (use g = 9.8 m/ s2) a. 2π7 secb.π7 secc.2π5secd.none of these Share with your friends Share 12 Deepak Kumar answered this Dear Student , If we displace the mass in any direction, the other spring will pull it back due to restoring force. The force if F=-kxon the other hand F=mf from newtons second law therefore mf=-kx f=-kmxthis is a representation of SHM where acceleration is proportional to the displacement.and the frequency ω=kmif period of oscillation is Tthen ω=2πT=km T= 2πkm Regards -66 View Full Answer