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Check your knowledge! Take our fun quiz for the beginner Drag Section of the Tennis Chapter of our textbook! Follow the instructions and then click on the "Check it!" button for each question.

Intermediate Activities: Drag

1.	Drag is one the of the _______ major forces of flight. (Check the correct answer.)
	two three four

2.	Drag is a resistance force and slows the forward motion of an object, including airplanes and tennis balls. (Check the correct answer.)
	True False

3.	There are _______ types of drag. (Check the correct answer.)
	two four six

4.	The sum of all _______ make up the total drag force. (Check the correct answer.)
	two four six

5.	For an aircraft, the drag forces oppose thrust. (Check the correct answer.)
	True False

6.	If the thrust force is greater than the drag force, the plane goes forward; but if the drag force exceeds the thrust, the plane will slow down and stop. (Check the correct answer.)
	True False

7.	For our tennis ball, there is no ________. (Check the correct answer.)
	drag lift thrust

8.	Our tennis ball, like a glider, is going to slow down until it hits the ground or your opponents racket. (Check the correct answer.)
	True False

9.	The _________ drag, is the force created by surface roughness. (Check the correct answer.)
	form friction induces

10.	The felt covering on our tennis ball is very rough and a great source of _________ drag. (Check the correct answer.)
	form friction induced

11.	The ________ drag, also called pressure drag, is affected by the shape of the body. (Check the correct answer.)
	form friction induced

12.	A smooth, streamlined shape will generate less ________ drag than a blunted or flat body. (Check the correct answer.)
	form friction induced

13.	________ drag, or drag due to lift is a small amount of excess force generated in the opposite direction of the lift force along a wing. (Check the correct answer.)
	Wave Form Induced

14.	________ drag slows the forward motion of the airplane and air- craft designers do their best to design wings that lower this type of drag. (Check the correct answer.)
	Wave Friction Induced

15.	________ drag, generally only occurs when an airplane is flying near or faster than the speed of sound. (Check the correct answer.)
	Wave Friction Induced

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