Answer: r x F.
- A r . F
- B r / F
- C F . r / |r|
- D r x F
Correct answer: D. r x F
Explanation: Moment (torque) = r x F, where r is the position vector from the point to the force application point. It is a vector.
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