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JAMB Physics 1998 Question 2

Question 2

Scalars and Vectors

A ball is moving at 18 m s−1 in a direction inclined at 60° to the horizontal. The horizontal component of its velocity is

  1. A.9√3 m s−1
  2. B.6√3 m s−1
  3. C.6√3 m s−1
  4. D.9 m s−1
Show the answer and explanation

Answer: D (9 m s−1)

Explanation

Horizontal component = 18 cos 60° = 18 × 0.5 = 9 m s−1.