Drag CERT 3

Ready for takeoff? What's the main reason airplanes feel the drag while soaring through the skies?

• The Earth spinning on its axis

• The total weight of all those holiday suitcases

• Zooming through the air at high speeds

• The roar of the airplane's engines

Ready to soar through the skies of knowledge? What are the two main forces that drag an aircraft back down to Earth?

• Parasite drag and Induced drag

• Gravity drag and Lift drag

• Engine drag and Wing drag

• Pressure drag and Friction drag

Ready to take off? 🛫 Let's dive into the world of aerodynamics! Which type of drag is created as air whooshes around an object, creating a pressure differential that's like an invisible tug? 🌬️✈️

• Friction drag

• Induced drag

• Form drag

• Interference drag

What magical force causes friction drag on our flying metal birds (airplanes)?

• The air whispering secrets along the surface of the airplane's skin

• The playful collision of airflows from different airplane parts

• The mystical shape of our airborne steed

• The invisible hands creating lift on the wings

Ready to be an aerospace engineer for a moment? Let's tackle a challenge! How can we sneakily reduce interference drag on our sleek airplane?

• By magically reducing the airplane's weight

• By performing an aerial ballet to change the angle of attack

• By using wizardly fairings to smooth out those pesky intersecting components

• By hitting the turbo and increasing the speed of the airplane

Ready for a high-flying question? Let's dive into the world of aerodynamics! What happens to parasite drag as we ramp up the velocity?

• Velocity and parasite drag are not related

• Velocity decreases, parasite drag decreases

• Velocity increases, parasite drag decreases

• Velocity increases, parasite drag increases

Ready to soar through the skies of knowledge? Let's dive into the world of aviation! What is induced drag a thrilling consequence of?

• The sleek shape of the airplane

• The airplane's hefty weight

• The airplane's blazing speed

• The magical production of lift

Ready to take off? Let's see how you handle this: How does induced drag change with velocity?

• First increases then decreases with speed

• Increases with speed

• Decreases with speed

• Remains constant regardless of speed

Ready for a high-flying question? At what speed do the drag forces of our aircraft, both the pesky parasite and the inevitable induced drag, decide to shake hands and intersect? This is a crucial point for pilots and engineers alike!

• Maximum drag speed

• Minimum drag speed, Vmd

• Optimal lift speed

• Maximum range speed, Vmr

Ever wondered why pilots prefer flying above the minimum drag speed? It's because it's speed stable! But what does that mean?

• It means any speed boost gets balanced out by more drag, bringing the plane back to a comfy cruising speed that matches the thrust.

• It's all about saving that precious fuel.

• It turns the plane into a non-stop speed machine, accelerating forever!

• It's a sneaky way to reduce the angle of attack.