Answer: (a.b)/|b|.
- A (a.b)/|a|
- B (a.b)/|b|
- C a x b / |b|
- D a.b
Correct answer: B. (a.b)/|b|
Explanation: Scalar projection of a onto b = (a.b)/|b|. The vector projection = [(a.b)/|b|<sup>2</sup>] * b.
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