Which scenario describes periodic behavior?

A. The movement of a CD in a CD-player
B. The takeoff and landing of a jet plane
C. The flight of a football during a pass
D. Tossing a tennis ball up into the air

I know a function that repeats itself after a specific period of time is called a Periodic Function.

I am just not sure if it might be A. The movement of a CD in a CD-player?

What do you think? Please explain. Thank you!

Question

Which scenario describes periodic behavior?

 A. The movement of a CD in a CD-player
 B. The takeoff and landing of a jet plane
 C. The flight of a football during a pass
 D. Tossing a tennis ball up into the air

 I know a function that repeats itself after a specific period of time is called a Periodic Function.

 I am just not sure if it might be A. The movement of a CD in a CD-player?

 What do you think? Please explain. Thank you!

littlebird · Answer

I think it is A as well since a cd is repeatedly spinning.

kj4uts · Answer

Ok thank you very much!