(H.W) If a person walk 1km north, 5km west, 3km south, an 7km east, find the resultant displacement vector. Ans. R= 21- 2j, R = 2.8 and 0 = 45° %3D (H.W) We consider the vector: Ā = 31 +j + 2k (a) Find the length of A Ans. VI4 (b) Find the scalar product of the vector C= 21 withA Ans.6 %3D (c) Find the cross product Ā xC. Ans.4j – 2k (d) Form the vectorÃ.Č. Ans. i+j+ 2k

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