Q: What does a projectile motion sound like?

Answer:

The key to simplifying projectile motion is to separate the vertical motion
from its horizontal motion.

Horizontal Motion

A projectile motion has a constant horizontal velocity. Horizontally, the
ball moves forward at a constant speed. This is why equally spaced
“ting” sounds are made as the ball crosses the vertical lines.

Vertical Motion

Gravity acts vertically downward. Vertically, the ball slows down on the way
up, and speeds up on the way down (at a constant rate of 9.81 m s^-2
downward). This is why the “ting” sounds become more and more spaced out on the
way up, and become closer and closer on the way down.

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