With what velocity does it hit the ground?

That depends on a number of things that we don't know because you haven't told us.

If any of the things on this list changes, then the answer to the question changes:

- - What is "it"?

- - Was it dropped, thrown, fired, or launched?

- - From what height above the ground?

- - With what speed?

- - In what direction?

- - What is the acceleration of gravity where this took place?

- - Did any drag act on it, due to liquid or gas, before it hit the ground?