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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 - The Magnus Effect

1.	Regardless of how you "tilt" the tennis ball it still looks the same - you can't change the angle of attack on a spherical ball. (Check the correct answer.)
	True False

2.	How do you generate lift on a ball? We need to set up the imbalance. Spinning the ball will do this. (Check the correct answer.)
	True False

3.	Topspin - the offense stroke in tennis. If the ball wasn't rotating as it flew through the air then both the top and bottom sides of the ball would meet the air rushing over it at the same speed. (Check the correct answer.)
	true false

4.	In topspin the top of the ball spins forward into the oncoming air. (Check the correct answer.)
	True False

5.	In topspin there is less movement of the air towards the bottom surface. (Check the correct answer.)
	True False

6.	With high pressure on one side and low pressure on the other there is an imbalance in the forces on the ball. (Check the correct answer.)
	True False

7.	In the case of topspin, the higher pressure on the top curves the ball downward from its straight line path. This is called the Magnus effect. (Check the correct answer.)
	True False

8.	The Magnus effect, affects only some sports balls. (Check the correct answer.)
	True False

9.	Topspin pulls the ball down faster. (Check the correct answer.)
	True False

10.	If there is no spin, there is no lift. (Check the correct answer.)
	True False

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