CE 322 Transportation Engineering
Quiz 1
Fall 2009
Name:_________________________
A newly designed car has a 9.2-ft wheelbase, is rear-wheel drive, and has a center of gravity 18 inches
above the road and 4.3 ft behind the front axle. The car weighs 2450 Ib, the mechanical efficiency of the
drive train is 90%, and the wheel radius is 14 inches. The base engine develops 185 ft-lb of torque, and a
modified version of the engine develops 215 ft-lb of torque. If the overall gear reduction ratio is 9 to 1,
what is the maximum acceleration from rest for the car with the 185 ft-lb engine and for the car with
the 215 ft-lb engine? (It is on good, dry, and level pavement.)
CE 322 Transportation Engineering
Quiz 1
Fall 2009
Name:_________________________