일반물리학 1 — Center of Mass and Linear Momentum: Problem 9

9 In the arrangement shown in Fig. 9-31, \(m_A = 2.0 \text{ kg}\) and \(m_B = 1.0 \text{ kg}\). The pulley is massless; the string is massless and long. The system is released at \(t = 0 \text{ s}\). Find (a) the acceleration of the center of mass of the blocks, (b) the displacement of the center of mass at \(t = 2.0 \text{ s}\), and (c) the speed of the center of mass when \(m_A\) strikes the floor.