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# 9 KN car has CD = 0.40, Af = 1.86 and an available tractive effort of 1.134 kN. If the car is travelling at an elevation of 1500m (q = 1.

An 8.9 KN car has CD = 0.40, Af = 1.86 and an available tractive effort of 1.134 kN. If the car is travelling at an elevation of 1500m (q = 1.0567 kg/m3) on a paved surface at the speed of 110 km/h what is the maximum grade that the car could ascend while maintaining the speed?