A rod of mass m and length L is pivoted at point O in a car whose acceleration towards left is a0. The rod is free to rotate in vertical plane. In equilibrium state, the rod remains horizontal when other end is suspended by a spring of force constant k. The time period of small oscillations of rod is The value of D is ___________. (Given,
In equilibrium,
During oscillations, consider a situation when the angular displacement of rod is as shown in the figure.
Pseudo force
ln the reference frame of car, restoring torque is.
Using the given values, we get
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