a 51.0 kg uniform square sign, of edge L = 2.00 m, is hung from a horizontal rod of length dh = 3.00 m and negligible mass. A cable is attached to the end of the rod and to a point on the wall at distance dv = 4.00 m above the point where the rod is hinged to the wall.

It seems like you've provided some information about a sign hanging from a horizontal rod. However, you haven't asked a specific question. Is there something specific you would like to know about this scenario?