As shown in Video V9.19 and Fig. P9.75, a spoiler is used on race cars to produce a nega...

As shown in Video V9.19 and Fig. P9.75, a spoiler is used on race cars to produce a negative lift, thereby giving a better tractive force. The lift coefficient for the airfoil shown is C_L = 1.1, and the coefficient of friction between the wheels and the pavement is 0.6. At a speed of 200 mph, by how much would use of the spoiler increase the maximum tractive force that could be generated between the wheels and ground? Assume the airspeed past the spoiler equals the car speed and that the airfoil acts directly over the drive wheels.