So I made this virtual car that moves at a velocity that is the sum of three different sine waves (whose individual frequencies I know). I constructed this velocity time graph
Then I perform a FFT on this data and get this amplitude-frequency graph:
The frequencies I input into my waves were 0.033, 0.083, and 0.117, so I'm wondering on how to confirm that these frequencies are showing up on the graph. Am I approaching this problem correctly?
I'm extremely new to FFT and any help/criticism would be much appreciated.