Conversation so far:
how fast is the tip of a whip
According to Alain Goriely's calculations, the tip can reach speeds more than 30 times the initial speed of the whip.
Why is there a loud sound when cracking a whip
Alain Goriely said, the crack of a whip comes from a loop traveling along the whip, gaining speed until it reaches the speed of sound and creates a sonic boom

Question: Who is responsibile for the discovery
Self-contained rewrite: Who is responsible for discovering that the loop in the whip causes the sound