The tractor exerts a towing force T = 400 lb. Determine the normal reactions at each of the two front and two rear tires and the tractive frictional force F on each rear tire needed to pull the load forward at constant velocity. The tractor has a weight of 7500 lb and a center of gravity located at GT. An additinal weight of 600 lb is added to its front having a center of gravity at GA. Take ms = 0.4. The front wheels are free to roll. 4 ft 3 ft 5 ft 2.5 ft A C B T F GA GT Prob. 82
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