A cable ABCD is pulled at end E by a force P(Figure P6.12). The cable is supported at poin...

A cable ABCD is pulled at end E by a force P(Figure P6.12). The cable is supported at point D by a rigid member DF. Compute the force P that produces a sag of 2 m at points B and C. The horizontal reaction at support F is zero. Compute the vertical reaction at F.