A. express the position vector from A to D, r_((D)/(A)) in Cartesian Vector Notation
B. Express the unit vector from A to D \mu _((D)/(A)) in cartesian vector notation.
C.Solve for the magnitude of the tension forces in the cables to keep the 100lb box in equilibruim. The Force AB is in the x-direction and the force in AC is in the negative y-direction. (F_(AB)=F_(AB)i and F_(AC)=-F_(AC)j)Figure 4. Cables supporting a 100 lb box