The 4-kg slender bar is 2 m in length. It is held in equilibrium in the position θ0 = 35°...

The 4-kg slender bar is 2 m in length. It is held in equilibrium in the position θ0 = 35° by a torsional spring with constant k. The spring is unstretched when the bar is vertical. Determine the period and frequency of small vibrations of the bar relative to the equilibrium position shown.