A shop sign, with a uniformly distributed mass m = 30 kg, h = 1.5m, w = 2m, and d = 0.6 m,...

A shop sign, with a uniformly distributed mass m = 30 kg, h = 1.5m, w = 2m, and d = 0.6 m, is at rest when cord AB suddenly breaks.

Figure P7.30

Modeling AB and CD as inextensible and with negligible mass, determine the tension in cord CD and the acceleration of the sign’s center of mass immediately after AB breaks.

Figure P7.30