Test 2 (T1.4, T1.5, T1.6)

As a car's velocity doubles, what happens to the amount of drag it experiences?

• It depends to other variables

• It quadruples

• It remains the same

• It increase eight times

Which of the following phenomena is associated with the Magnus Effect around a wheel?

• Increase in aerodynamic Drag

• Reduction in Lift force

• Generation of Lift force due to rotation

• Decrease in air pressure at high speeds

Which of the following best describes the concept of shape resistance and detachment of the boundary layer?

• The tendency for an object's shape to resist airflow, leading to increased Drag

• The phenomenon were the boundary layer separates from the surface of an object due to adverse pressure gradients

• The ability of an object's streamlined shape to minimize aerodynamic Drag

• The resistance experienced by an object due to changes in air pressure around its surface

The acronym NACA means:

• National Accord Concern Airfoils

• Notation Advisory Cars Agency

• Notation Airfoils Commitee Agency

• National Advisory Commitee Aeronautics

According to the information provided for NACA airfoils, asymmetrical airfoils present the lift coefficient CL = 0 when the angle of attack is:

• Alpha < 0º

• Alpha = 0º

• Alpha > 0º