Question 1
Scalars and VectorsA man walks 1 km due east and then 1 km due north. His displacement is
- A.1 km N 15° E
- B.1 km N 30° E
- C.√2 km N 45° E
- D.√2 km N 60° E
- E.2 km N 75° E
Show the answer and explanation
Answer: C (√2 km N 45° E)
Explanation
The two 1 km legs are at right angles, so the resultant is √(1² + 1²) = √2 km. Since both legs are equal, it points midway between north and east: N 45° E.