An engineer designs a rear-wheel–drive car (without an engine) that weighs 2000 lb and has a 100-inch wheelbase, drivetrain efficiency of 80%, 14-inch–radius wheels, an overall gear reduction ratio of 10 to 1,
and a center of gravity (without engine) that is 22 inches above the roadway surface and 55 inches behind the front axle. An engine that weighs 3 lb for each ft-lb of developed torque is to be placed in the front portion of
the car. Calculations show that for every 20 lb of engine weight added, the car’s center of gravity moves 1 inch closer to the front axle (but stays at the same height above the roadway surface). If the car is starting from rest on a level paved roadway with a coefficient of adhesion of 0.8, select an engine size (weight and associated torque) that will result in the highest possible available tractive effort?