Before the trunk of a large tree is felled, cables AB and BC are attached as shown. Knowing that the tensions in cables AB and BC are
575 N and 680 N , respectively, determine the moment about O of the resultant force exerted on the tree by the cable at B.
The moment about O of the resultant force exerted on the tree by the cables at BN*m
N*m. (Include a minus sign if necessary.)