일반물리학 1 — Oscillations: Problem 49

49 For the damped oscillator system shown in Fig. 15-16, the block has a mass of 1.50 kg and the spring constant is 9.50 N/m. The damping force is given by -b(dx/dt), where b = 230 g/s. The block is pulled down 12.0 cm and released. (a) Calculate the time required for the amplitude of the resulting oscillations to fall to one-third of its initial value. (b) How many oscillations are made by the block in this time?