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Category > Physics Posted 20 Apr 2017 My Price 6.00

air resistance

19. Ignoring air resistance is a large error when dealing with cars, especially when they are traveling at
high speeds- Remember that air resistance depends on the speed squared: FAR=AV2- Problem 19 Problem 2t} % :" : a) Draw a “FED” for the car. Show that the power required to keep a car going at constant speed
on a flat road against air resistance alone is proportional to the speed to file third power. b) If your car consumes 20 hp when traveh'ng at a constant speed of 30 mph. How much more
power would it need to travel at a constant speed of 60 mph under the same conditions? c) What are the units of the constant “A” in the m system? Remember that the constant A varies
for thferent cars- d) Explain why ears are generally less eflicient at higher speed than at lower speeds.

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SuperTutor
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Status NEW Posted 20 Apr 2017 03:04 AM My Price 6.00

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