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 P7.31
Modeling AB and CD as elastic cords with negligible mass and stiffness k = 8000 N/m, determine the tension in cord CD and the acceleration of the sign’s center of mass immediately after AB breaks.
Figure P7.31
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