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A car is traveling at 20 mi/h on a roadway covered with hard-packed snow (coefficient of...

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Civil Engineering

A car is traveling at 20 mi/h on a roadway covered withhard-packed snow (coefficient of road adhesion of 0.25). The carhas CD = 0.30, Af = 22 ft2, and W = 2800 lb.The wheelbase is 120 inches, and the center of gravity is 20 inchesabove the roadway surface and 50 inches behind the front axle. Theair density is 0.002045 slugs/ft3. The car’s engine isproducing 100 ft-lb of torque and is in a gear that gives anoverall gear reduction ratio of 4.5 to 1, the wheel radius is 14inches, and the mechanical efficiency of the drivetrain is 80%. Ifthe driver needs to accelerate quickly to avoid an accident, whatwould the acceleration be if the car is front-wheel drive

Select one:

a. 3.78 ft/s^2

b. 3.83 ft/s^2

c. 2.83 ft/s^2

d. 2.78 ft/s^2

Answer & Explanation Solved by verified expert
4.0 Ratings (443 Votes)
SolutionAnswer c 283    See Answer
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