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26 Nov 2019
You have been asked to test drive a car and study itsactualperformance relative to its specifications. This particularcar'sengine is rated at 173 hp. This valueis the peakrating, which means that it is capable, atmost, of providing energyat the rate of 173 hp to the drive wheels. You determine thatthecar's mass (including test equipment and driver on board) is938kg.
(a) When cruising at a constant 55 mi/hyouronboard engine-monitoring computer determines that the engineisproducing 13.6 hp. From previouscoasting experiments, it has beendetermined that the coefficientof rolling friction on the car is0.0195. Assume that the drag force on the carvaries as the squareof the car's speed. That is,Fd =Cv2. What isthe value of the constant,C?
1 kg/m
(b) Considering the peak power, what is the maximum speed (tothenearest 1 mi/h) that you would expect the car could attain?(Thisproblem can be done by hand analytically, but it can be donemoreeasily and quickly using a graphing calculator orspreadsheet.)
2 mi/h
You have been asked to test drive a car and study itsactualperformance relative to its specifications. This particularcar'sengine is rated at 173 hp. This valueis the peakrating, which means that it is capable, atmost, of providing energyat the rate of 173 hp to the drive wheels. You determine thatthecar's mass (including test equipment and driver on board) is938kg.
(a) When cruising at a constant 55 mi/hyouronboard engine-monitoring computer determines that the engineisproducing 13.6 hp. From previouscoasting experiments, it has beendetermined that the coefficientof rolling friction on the car is0.0195. Assume that the drag force on the carvaries as the squareof the car's speed. That is,Fd =Cv2. What isthe value of the constant,C?
1 kg/m
(b) Considering the peak power, what is the maximum speed (tothenearest 1 mi/h) that you would expect the car could attain?(Thisproblem can be done by hand analytically, but it can be donemoreeasily and quickly using a graphing calculator orspreadsheet.)
2 mi/h
1 kg/m
(b) Considering the peak power, what is the maximum speed (tothenearest 1 mi/h) that you would expect the car could attain?(Thisproblem can be done by hand analytically, but it can be donemoreeasily and quickly using a graphing calculator orspreadsheet.)
2 mi/h
Bunny GreenfelderLv2
15 May 2019
