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Find the projection of A on B. Given A = 10j + 3k and B = 4j + 5k.

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Find the projection of A on B. Given A = 10j + 3k and B = 4j + 5k.

(a) 6

(b) 6.25

(c) 6.5

(d) 6.75

I have been asked this question in a job interview.

This is a very interesting question from Position and Distance Vectors in portion Vector Analysis and Applications of Electromagnetic Theory

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The correct option is (b) 6.25

For explanation: Projection of A on B = (A . B)/|B|. Thus the answer is 40/6.4= 6.25.

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