
  Learning Goal: To determine Cartesian force components from magnitude and determine position and resultant vectors by summing Cartesian components. As shown, a 2.7?lb ball is suspended at point D inside a box with dimensions w=9.30ft,d=6.60ft, and h=4.40ft. The ball is held in place by three cables anchored at points A,B, and C on the surface of the box. If point D is the origin of the Cartesian coordinate system, point A is located at (?4.40,?3.60,2.80)ft, point B is located at (2.20,?3.60,1.90)ft, and point C is located at (2.20,5.70,?1.60)ft. Part A - Determining Cartesian components of force The tension in cable DA has a magnitude of TDA?=6.75lb. Find the Cartesian components of tension TDA?, which is directed from D to A. Express your answers, separated by commas, to three significant figures. Part B - Determining an unknown force If the tensions in cables DA and DB are TDA?=6.75lb and TDB?=4.13lb, respectively, what is the tension in cable DC ? Express your answer to three significant figures and include the appropriate units.