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A ball is moving at 18ms\(^{-1}\) in a direction inclined at 60º to the horizontal. The...

Physics
JAMB 1998

A ball is moving at 18ms\(^{-1}\) in a direction inclined at 60º to the horizontal. The horizontal component to its velocity is

  • A. 9√3ms-1 ·
  • B. 6√3ms-1 ·
  • C. 8√3ms-1 ·
  • D. 9ms-1 ·
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Correct Answer: Option D
Explanation

Since the angle is inclined to the horizontal,

The horizontal component of the velocity V\(_x\) = V x cos \(\theta\) = 18 x cos 60º = 9m/s 

(NOTE: Cos 60º = 0.5)

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