[quote=@Silvan Haven]
You may be underestimating what a total understanding of the kinetic energy in an area will let a person do.
[/quote]

Very little without some means to influence it. Let's assume a savant with that ability and decent physical training: with effort, they will be able to match casual attacks with a gear using only their bare hands. Everyone else gets the fun of spotting exactly how they're squished.

Don't bring physics into this. xD