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A ball of mass 800g moving horizontally with a speed of 5m/s hits a vertical...

Physics
JAMB 2018

A ball of mass 800g moving horizontally with a speed of 5m/s hits a vertical wall and rebounds with the same speed. The impulse experienced by the ball is?

  • A. 0kgm
  • B. 2kgm/s
  • C. 4kgm/s
  • D. 8kgm/s
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Correct Answer: Option D
Explanation

Initial momentum = (0.8) × (5)

 = 4.0kgms\(^{-1}\)

  Final momentum

  = (0.8) × (– 5)

 = – 4.0kgms\(^{-1}\)

  Impulse on ball

  = Change in momentum

 = 4.0 – (– 4.0)

  = 8.0.0kgms\(^{-1}\)

There is an explanation video available below.


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Explanation Video

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