1) The resultant of the two forces in a plane is 400 120. One of the forces is 200 20. Determine the missing force (outline the steps taken to solve this graphically by a) Parallelogram Law, b) Triangle Law).

2). In a plane, subtract 130 , 60 from 280 320. Note: Subtraction of a vector is accomplished by adding the negative of a vector. = + ()

3)Determine the resultant of the following coplanar system of forces: 26 , 10, 39 , 114, 63 , 183, and 57 , 261. Use the Polygon Rule for Addition