What is the unit vector in the direction of A = 2î − 2ĵ + k̂?
Correct answer C. (2î − 2ĵ + k̂)/3
Explanation
A unit vector is the vector divided by its magnitude. Here |A| = √(4 + 4 + 1) = 3, so the unit vector is (2î − 2ĵ + k̂)/3.
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