(Solved): Example 2: Figure shows two objects (mA=4kg and mB=8kg) connected by a massless cord ...

Example 2: Figure shows two objects $(m_{\mathrm{A}}=4\mathrm{kg}$ and $m_{\mathrm{B}}=8\mathrm{kg})$ connected by a massless cord running over a massless and frictionless pulley. The system is released from rest. Assuming a frictionless surface on the table, find a) the acceleration of the objects and b) the tension in the cord.