MDCAT Physics MCQ #3707

What is the unit vector in the direction of the vector A = 3i + 4j?

MDCAT Physics MCQ #3707

  1. Question 1

    Q1. What is the unit vector in the direction of the vector A = 3i + 4j?

    • A) (3i + 4j) / 5
    • B) (3i + 4j) / 7
    • C) (3i + 4j) / 25
    • D) (3i + 4j) / 1

    Answer: (3i + 4j) / 5

    Explanation: A unit vector is the vector divided by its magnitude (sqrt(3^2 + 4^2) = 5). Option C incorrectly uses the square of the magnitude.