Question

A car is traveling at 20 mi/h on good, dry
pavement at 5000 ft elevation. The front-wheel-drive
car has a drag coefficient of 0.30, a frontal area of 20 ft2
and a weight of 2500 lb. The wheelbase is 110 inches
and the center of gravity is 20 inches from the ground,
50 inches behind the front axle. The engine is producing
95 ft-lb of torque and is in a gear that gives an overall
gear reduction ratio of 4.5. The radius of the drive
wheels is 14 inches and the mechanical efficiency of the
drivetrain is 90%. What would the acceleration of the
car be if the driver was accelerating quickly to avoid a
collision?

a) 3.65 ft/s2
b) 15.53 ft/s2
c) 15.90 ft/s2
d) 3.48 ft/s2

Answer 1

Note - Air density is taken as 0.002045 slugs/

coefficient of road adhesion for good ,dry pavement- 1.00( max)

So option D is correct.

Feel free to drop any doubt in comment section.