Calculate the zero-lift angle of attack. b) Calculate the lift coefficient when α=5 degrees. c) If the airfoil is flipped upside down, what angle of attack is required to generate as much lift as in part (b)? d) Compare the results you obtained with experimental data for the NACA 4412 airfoil and note the percentage difference between theory and experiment. Where in your opinion lie the biggest discrepancies between theory and experiment?

From negative to negative

Sorry i don’t know what to do

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction