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A car traveling at 30ms\(^{-1}\) overcomes a frictional resistance of 100N while moving. Calculate the power...

Physics
WAEC 2014

A car traveling at 30ms\(^{-1}\) overcomes a frictional resistance of 100N while moving. Calculate the power developed by the engine. [1 hp = 0.75 kW]

  • A. 0.23hp
  • B. 0.40hp
  • C. 4.00hp
  • D. 4.40hp
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Correct Answer: Option C
Explanation

P = FV = \(\frac{100 \times 30}{1000} = 3 kW\)

\(\frac{3}{0.75} = 4hp\)

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