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JAMB Physics 2002 Question 7

Question 7

Scalars and Vectors

Two forces each of 10N act on a body, one towards the north and the other towards the east. The magnitude and the direction of the resultant force are

  1. A.10√2 N, 45°E
  2. B.10√2 N, 45°W
  3. C.20N, 45°W
  4. D.20N, 45°E
Show the answer and explanation

Answer: A (10√2 N, 45°E)

Explanation

R = √(102 + 102) = 10√2 N, and tan θ = 10/10 gives 45° between north and east (N45°E).