a bar of length 3L and mass per unit length of p is pin-supported at O and is suspended by a linear spring of modulus k at the right end. The bar is static equilibrium in the horizontal position shown (which means that the spring is stretched in that position). Determine the expression for the natural frequency. of the system. Find the response that results from giving the bar an initial angle 0.03 rad in the clockwise direction and letting it go from rest. Neglect the mass of the spring