VECTORS AND SCALARS: BASIC CONCEPTS Exercise 7.2 Solution : 1. For the arbitrary points A, B, C, D and E, and a single vector which is equivalent to A: DC + CB = DB B: CE + DC = DE 2. shows a cube. Let p = AB, q = AD and r = AE . Express the vectors representing BD, AC and AG in terms of p, q and r. Consider the triangle ABD shown in Figure. We note that BD represents the third side of the triangle formed when AD are placed head to tail. Using the triangle law we find : AB + BD = AD => BD = AD - AB = q - p Consider the triangle ADC shown in Figure. We note that AD represe...