Part B Short Answer | 13 murks| Show your work for full credit 1. Express a force of 1240 N applied at 30 to the horizontal as a Cartesian vector. Use exact values only. [2] 2. lfft' = [2. 9] and ii = [16, k], and 11' is orthogonal to 1'5 , determine the value ofk. [3] 3. Calculate the dot product for the following pairs of vectors. If necessary, round to one decimal place. [2, 2] a) pa = 8, |b| = 11, 9 = 55 b)= [2,9], = [8,7] 4. Given that hill = 10, and l'l = 70, and the angle between and is 120, determine the projection 11' on 13. [4]