Answer: F . d.
- A F + d
- B F x d
- C F . d
- D |F||d|
Correct answer: C. F . d
Explanation: Work W = F . d = |F||d|cos(theta). Work is a scalar equal to the dot product of force and displacement vectors.
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