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Many sports cars are convertibles. The air flow over such a car is significantly different depending...

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Mechanical Engineering

Many sports cars are convertibles. The air flow over such a caris significantly different depending on whether the convertible topis up or down. The engine of the 1000-kg car delivers 135 kW to thewheels, the car frontal area is 1.9 m2 and rollingresistance is 2.5% of the car weight. The drag coefficient when thetop is down is 0.43 and 0.31 when it is up. For 20 ºC air at oneatmosphere, determine:

a. the maximum speed with the top up (in m/s)

b. the maximum speed with the top down (in m/s)

Answer & Explanation Solved by verified expert
3.6 Ratings (644 Votes)
Rolling resistance 0025 x weight of car 0025 x 1000 x 981 24525 N Power Force x velocity Force Resistance by drag    See Answer
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