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JAMB Physics 1988 Question 4

Question 4

Scalars and Vectors

Two forces whose resultant is 100 N, are at right angles to each other. If one of them makes an angle of 30° with the resultant, determine its magnitude.

  1. A.8.66 N
  2. B.50.0 N
  3. C.57.7 N
  4. D.86.6 N
Show the answer and explanation

Answer: D (86.6 N)

Explanation

The component of the resultant along that force is 100 cos 30° = 86.6 N.