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Understanding Aerodynamic Drag

Authored by Abraham Haile

Instructional Technology

9th - 12th Grade

Understanding Aerodynamic Drag
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the two components into which a drag force can be divided?

Weight and thrust

Thrust and lift

Pressure drag and friction drag

Lift and weight

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What causes wall shear stresses?

Frictional forces due to fluid viscosity

The object's speed through the fluid

Turbulence in the fluid

Pressure differences around the object

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

At what angle does flow separation occur for a smooth sphere in laminar flow?

90 degrees

100 degrees

120 degrees

80 degrees

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the effect of turbulence on the boundary layer in terms of flow separation?

It reduces the boundary layer thickness

It delays flow separation

It causes immediate separation

It has no effect

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why are golf balls designed with dimples?

To make them look unique

To increase their weight

To increase their speed

To reduce pressure drag by delaying flow separation

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary goal of Hybrid Laminar Flow Control?

To increase turbulence

To delay the onset of turbulence

To reduce the fluid's viscosity

To increase the fluid's density

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How much could artificial shark skin reduce the total drag force on a commercial airliner?

2%

1%

5%

10%

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