Answer: 1.
- A 0
- B The same as original vector
- C Equal to direction
- D 1
Correct answer: D. 1
Explanation: A unit vector has magnitude exactly 1. It only indicates direction.
Triangle law of vector addition: placing vector b at the head of vector a, the diagonal from the start to the final head gives the resultant a + b.
Concept context
Vectors, dot product, cross product, and geometric applications