A block with massmA = 12.0 kg on a smooth horizontal surface is connected by a thin cord that passes over a pulley to a second block with mass mB = 5.5 kg which hangs vertically.

1. Determine the magnitude of the acceleration of the system.

2. If initiallymA is at rest 1.250 mm from the edge of the table, how long does it take to reach the edge of the table if the system is allowed to move freely?

3. IfmB = 1.0 kg, how large must mA be if the acceleration of the system is to be kept at g100g100?