Some way to stop player motion

[Otzelix]

Ive run into this issue a lot when working with the library.

When making an air jump for example, it is pretty hard to get the jumps to be consistent, as the players y-momentum is always different.
A function which stops player motion would be a life saver when trying to get consistent motion.

[duck116]

to stop the players momentum tp to ~~~ at the start of the jump because tp resets momentum.
tp @p ~~~