Q1: The slender bar and disc of Figure a, have masses of 31 kg and 15 kg respectively. The ensuing oscillations of P are monitored, and the displacement data is shown in Figure b. Use the data to find the spring stiffness k and the damping coefficient c M = 15 kg/ uc=? m = 31 kg -1 -2 k=' 1.2m -3 0.05 0.1 0.15 0.2 0.25 +0.65 m+ -1.95 m Time (s) (a) (b) 4. 1. Displacement (mm)

Q1: The slender bar and disc of Figure a, have masses of 31 kg and 15 kg respectively. The ensuing oscillations of P are monitored, and the displacement data is shown in Figure b. Use the data to find the spring stiffness k and the damping coefficient c M = 15 kg/ uc=? m = 31 kg -1 -2 k=' 1.2m -3 0.05 0.1 0.15 0.2 0.25 +0.65 m+ -1.95 m Time (s) (a) (b) 4. 1. Displacement (mm)