state all final values in SI units to the correct number of significant figures. Draw a diagram for every question, label as required and include coordinate axes. Clearly show the key equation for each question and in words, describe any principles you've used. 04. A racing car is designed to produce downforce as it moves. Airis directed beneath the chassis and between the wheels as shown in the simplified diagram below. The crosssectional area at the very front of the car is A0 = 0.0330 m 2 and at the centre, it is A1 = 0.0310 m 2. The car moves forward at 30.0 mfs. Draw and label a free body diagram that includes the weight of the car, downforce and normal force. Calculate the difference in pressure between the airunder the middle of the car(with crossrsectional area A2) and atmosphere. State whether the pressure under the caris higher or lowerthan atmospheric pressure. You can treat the airflow underthe car as laminar and as though it occurs through a closed pipe that decreases in crosssectional area