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

Physics
WAEC 2012

A body is pulled through a distance of 500m by a force of 20N. If the power developed is 0.4kW, calculate the time for which the force acts

  • A. 250.0s
  • B. 25.0s
  • C. 2.5s
  • D. 0.5s
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Correct Answer: Option B
Explanation

Force x Distance = Power x Time

Time = \(\frac{Force \times Distance}{Power}\)

= \(\frac{20 \times 500}{0.4 \times 1000}\)

= 25.0s


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