# How to deal with a mistake in a question after answers were provided?

I asked How to theoretically calculate the maximum acceleration? but I noticed that I made a mistake in the formula.

The question (body, not title) was only about one aspect, which has been answered properly, but now a second one arose.

How should I handle the mistake and the already posted (good) answer?

IIWY, I would just edit the question (using the edit link beneath your post, and leave a comment (mentioning the update) for the person who answered (i.e. Tom), by addressing them, using their username and preceding it with the @ symbol (or, easier still, just leave a comment under their answer).
There is an edit history anyway (again, accessible via the edited link beneath the post), if that is your concern, so all changes can be tracked and viewed (and rolled back to, if need be) at a later date.