A 100-lb advertising panel of length 2a = 7.2ft and width 2b = 4.8 ft is kept rotating at a constant rate ω1 about its horizontal axis by a small electric motor attached at A to frame ACB. This frame itself is kept rotating at a constant rate ω2 about a vertical axis by a second motor attached at C to the column CD. Knowing that the panel and the frame complete a full revolution in 6s and 12s, respectively, express, as a function of the angle θ, the dynamic reaction exerted on column CD by its support at D.

Transcribed Image Text:

C