Answer: 14.
- A 6
- B 36
- C 12
- D 14
Correct answer: D. 14
Explanation: |a|2 = 12 + 22 + 32 = 1 + 4 + 9 = 14.
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