Answer: 0.
- A 0
- B 1
- C Undefined
- D -1
Correct answer: A. 0
Explanation: The zero vector (null vector) has magnitude 0 and no definite 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