A car traveling at 30ms\(^{-1}\) overcomes a frictional resistance of 100N while moving. Calculate the...
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
Correct Answer: C. 4.00hp
Explanation
P = FV = \(\frac{100 \times 30}{1000} = 3 kW\)
\(\frac{3}{0.75} = 4hp\)
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