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A body is pulled over a distance of 500m by a force of 20N. If...

Physics
WAEC 2011
A body is pulled over a distance of 500m by a force of 20N. If the power developed is o.4 kW, calculate the time interval during which the force is applied
  • A. 0.2s
  • B. 2.5s
  • C. 25.0s
  • D. 250.0s
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Correct Answer: Option C
Explanation
t = \(\frac{fs}{p} = \frac{20 \times 500}{0.4 \times 1000} = 25s\)
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