system
Given the following post, respond as if you're commenting on Reddit:
human
[DC Comics] Is the speedforce part of the in-universe explanation as to why a speedster and their "passengers" don't get whiplash? What do other universes use?

Also, can Kryptonians tap into the speedforce or an alternative?
gpt
Basically, yes. The speed force awards a protective aura to those who are able to tap into it, which is what protects speedsters and their passengers from whiplash, dust particles and air friction. One future timeline dealt with how one of Wally West's kids was born without the aura and using his super speed would seriously injure him every time. As for kryptonians, their biology (specifically when exposed to yellow suns) is typically what's behind their feats. However when the feats get beyond extreme the speed force just sort of, helps. Example when superman broke the time barrier and when he used the relative mass punch

As for other universes it just isn't really touched on, but then again they don't have as fast of characters in most universes as in DC. Marcel's Quicksilver for example can only go around Mach 6 after exposure to an enhancement isotope by the High Evolutionary. And while this is very fast it's nowhere near what's reached in DC, the typical reasoning for quicksilver is that as a mutant his body is just built with the ability to function at these speeds, which is why (unlike flash) he finds it annoying to spend large amounts of time around normal people, he can't turn his powers off and so he perceives everyone moving in slow motion 100% of the time.