Is there a function to tell me how fast I'm falling down?

I'm making another script for my game that'll tell me how fast I'm falling down, in studs per second. Is there any way that I can figure out how fast I'm falling down? I looked on YouTube and on other forums about the speed that a character falls down, but I didn't find any answers. Does anyone know what to use? By the way, I don't have any code to show you because I don't know.

Thanks, Green_Lime2

My question was answered by tomekcz. Here is the code I used:

while true do

local character = game.Players.LocalPlayer.Character
local rootpart = character:WaitForChild("HumanoidRootPart")
local playergui = game.Players.LocalPlayer.PlayerGui
local velocity = rootpart.Velocity.Y
local velocityNum = math.floor(velocity*1)/1

	playergui.ScreenGui2.TextLabel.Text = (velocityNum.. " s/s")
	wait()
end