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The correct answer will be option A. First find moment of inertia about hinge point I= 3ml²/2 Now rotate the frame by angle ¢ . then the torque applied by spring K2 will be k2 *¢ * (L/√3)² Torque by k1 = k1 *¢*(√3L/2)² Net torque is calculated by adding both torque and is equal to iw²¢ By this you can calculate W and thus w/2π is frequency.
Dear student rotate the frame by angle ¢ . then the torque applied by spring K2 will be k2 *¢ * (L/√3)²Torque by k1 = k1 *¢*(√3L/2)²Net torque is calculated by adding both torque and is equal to iw²¢By this you can calculate W and thus w/2π is frequency
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