Unit vector is used to specify the _____________?
Correct answer: C. Direction of vector
- A. Magnitude
- B. Velocity
- C. Direction of vector
- D. Frequency
Explanation
A unit vector has magnitude 1 and is used mainly to specify direction, such as i, j and k along coordinate axes. It does not by itself specify the magnitude of a physical vector. The likely mistake is choosing magnitude because the word “unit” suggests a numerical size, but its defining size is one.
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About Addition of Vectors
Vector addition combines directed quantities using the head-to-tail, parallelogram and component methods. Work includes finding the resultant magnitude and direction for two or more vectors, resolving vectors into perpendicular components, and distinguishing vector addition from scalar addition, where direction has no role.
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