How do I make a block move itself forward?

How do I make a block move itself forward like how velocity used to be. And not putting velocity under to the block under the part. But every time it repeats it goes up by a certain amount until it hits a max speed. What I am making is like a RC car drifting game and I might want to add turning later but for now I'd keep it to only move forward by W. Maybe CFrame will do the job. I don't know. I need recommendations. And I just want it when I am holding W it speeds up until max speed and when I let go for it to slow down. Pls keep as much things as you can that I already put it. (Btw RC is just a part named RC in workspace. and it has a script in it that says to anchor itself when a person joins the game because it starts unanchored.) I tried to put in all my info about this script pls try a script and pls try and fix it. If you aren't going to give me a list of issues and a revised script then type your thoughts/comments in the comment section pls. Btw its a LOCAL SCRIPT renamed to "W keypress" and its in 'STARTER GUI'.

local Player = game.Players.LocalPlayer
local Mouse = Player:GetMouse()
local RC = game.Workspace.RC

game:GetService("UserInputService").InputBegan:Connect(function(inputObject, gameProcessedEvent)
    if inputObject.KeyCode == Enum.KeyCode.W then
		RC.Anchored = false
        print("w has been pressed")
        --RC.Velocity = Vector3.new(+5,0,0)--
    end
end)

game:GetService("UserInputService").InputEnded:Connect(function(inputObject, gameProcessedEvent)
    if inputObject.KeyCode == Enum.KeyCode.W then
        print("w has stopped being pressed")
		--RC.Velocity = Vector3.new(0,0,0)--
		RC.Anchored = true
    end
end)