limiting velocity, and problems with parenting

Hello, sorry if this has been asked before, but I’ve scoured endlessly for the past two days for an answer and can’t find one.

Basically, I have a game character that moves around using servo control. Sometimes various circumstance lead it to accelerate beyond the speed I want. Is there a way to limit its velocity to never go above 7? I don’t know ANYTHING about python, so it’d be great to just get a clear copypasta and tutorial as to how to implement it.

Oh, and while I’m at it, my camera is parented to the character, but it sometimes strays. Is there a way to ensure that it always stays within a certain position in relation to the character?