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A force acting on a body causes a change in the momentum of the body...

Physics
WAEC 2004
A force acting on a body causes a change in the momentum of the body from 12kg ms-1 to 16kg ms-1 in 0.2s. calculate the magnitude of the force
  • A. 140.0N
  • B. 20.0N
  • C. 4.0N
  • D. 0.8N
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Correct Answer: Option B
Explanation
F = \(\frac{mv - mu}{t} = \frac{16 - 12}{0.2} = 20N\)
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