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

Activities: Tennis Ball - Lift

1.	Lift is generated differently on an aircraft than on a tennis ball. (Check the correct answer.)
	True False

2.	The spin of the tennis ball is responsible for its lift. (Check the correct answer.)
	True False

3.	Lift is the force that pushes the airplane or a bird up against the weight and is created by the movement of the air around the wings. (Check the correct answer.)
	true false

4.	The lift created by the body or tail is large. (Check the correct answer.)
	True False

5.	An object on the moon weighs less than the same object on earth. (Check the correct answer.)
	True False

6.	In level flight, lift must equal weight. (Check the correct answer.)
	True False

7.	When going down, lift must be less than weight. (Check the correct answer.)
	True False

8.	The velocity of the object is the most important element in producing lift. (Check the correct answer.)
	True False

9.	If the velocity of the airplane is increased, the lift will decrease dramatically.(Check the correct answer.)
	True False

10.	If you double the velocity, you get ____ times the lift. (Check the correct answer.)
	2 3 4

11.	If you triple the speed, you get _____ times the lift. (Check the correct answer.)
	4 6 9

12.	The shape of an airfoil (wing) is important for lift, and is designed carefully. (Check the correct answer.)
	True False

13.	There needs to be a higher velocity on the top side of the wing, and a lower velocity on the underside of the wing. (Check the correct answer.)
	True False

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