After this lesson, you should be able to:

• Represent a Cartesian plane in 2-D as a set of x and y axes
• Add co-linear vectors, on an x or y axis
• Distinguish between vector and scalar components
• Find the resultant R of R_x and R_y graphically, using the
  • tail-to-head method
  • tail-to-tail (or parallelogram) method
• Calculate the resultant R of R_x and R_y using the theorem of Pythagoras
• Find the resultant of a number of forces graphically, with the tail-to-head method
• Find the resultant of a number of forces by calculation
• Understand what is a closed vector diagram
• Determine the direction of the resultant using trigonometric functions