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Question 5128
NEET Physics · Medium

Basic Mathematics & Vectors: Vector Addition by Components MCQ

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Vector Addition by ComponentsMediumQuestion 5128

Question

The unit vector along the direction of A = 3î + 4ĵ is:
  1. A
    (3î + 4ĵ)/5
    Correct
  2. B
    (3î + 4ĵ)/7
  3. C
    3î + 4ĵ
  4. D
    (3î − 4ĵ)/5

Correct answer

(3î + 4ĵ)/5

Explanation

|A| = √(9+16) = 5. Unit vector â = A/|A| = (3î + 4ĵ)/5.

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