Problem 2: Determine the drag coefficient (fill in the blanks)

A 2780 lb car is traveling at sea level at a constant speed. Its engine is running at 4500 rev/min and

is producing 175 ft-lb of torque. It has a drivetrain efficiency of 90%, a drive axle slippage of 2%, 15-

in radius wheels, and an overall gear reduction ration of 3 to 1. If the car's frontal area is 21.5 ft²,

what is its drag coefficient? Pay attention to the units and write your answer in two decimal places,

unless otherwise specified.

V =

Fe =

frl =

Rrl=

Cd =

ft/s

lbs

(three decimal places)

Commer

lbs