Vectors 1 Question 4
4. Let and be three vectors such that the projection vector of on is . If is perpendicular to , then is equal to
(a) 6
(b) 4
(c)
(d)
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Answer:
Correct Answer: 4. (b)
Solution:
- According to given information, we have the following figure.
Clearly, projection of
But projection of
Now,
From Eqs. (i) and (ii),