Also, Some physicists call the fourth, fifth, and sixth derivative of position, "snap, crackle, and pop" respectively. Physicists are a fun lot aren't they?
https://en.wikipedia.org/wiki/Fourth,_fifth,_and_sixth_deriv...
I thought were all useless terms but apparently snap is quite commonly used in quadrotor motion control.
I've also heard this is important for self-driving convoys. You want the cars in the convoy to all accelerate and brake smoothly rather than jostle all the things inside them.
That's third derivative of position and called jerk.
Not defending BBC's using non-prescribed terms, but quarks were always named whimsically. The word quark itself having been taken from Ulysses.
It's hard to argue with snap following jerk, then acceleration then velocity. The next two follow snap, if not physically then at least historically.
Atomic cross section is measured in barns. As in "you couldn't hit a barn door".