Question 3
Scalars and VectorsIn the diagram above, P, Q and R are vectors. Which of the following options gives the correct relationship between the vectors?
- A.P = Q + R
- B.P = Q − R
- C.P = R − Q
- D.P + Q + R = 0
Show the answer and explanation
Answer: D (P + Q + R = 0)
Explanation
The three arrows follow one another head to tail round the triangle and end where they started, so their sum is zero: P + Q + R = 0.