Trying to make dashing script [R6]

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#1

I am trying to make a script so the player dashes when they press Q, this works just how I want it, exept when you jump and then dash you fall, i want to make the player not fall until the dash is complete.

local player = game.Players.LocalPlayer
repeat wait() until player.Character.Humanoid
local humanoid = player.Character.Humanoid
local mouse = player:GetMouse()
local uis = game:GetService("UserInputService")
local i = 0
local anims = {script.Dash1,script.Dash2}

local cooldown = false
local cooldowntime = 0.7
uis.InputBegan:Connect(function(key)
	if not cooldown then
		if key.KeyCode == Enum.KeyCode.Q then
			cooldown = true
			i = 1-i
			local playAnim = humanoid:LoadAnimation(anims[1+i])
			playAnim:Play()
			script.Sound:Play()
			if humanoid:GetState() ~= Enum.HumanoidStateType.Freefall then
				player.Character.HumanoidRootPart.Velocity = player.Character.HumanoidRootPart.CFrame.lookVector * 200
			else
				player.Character.HumanoidRootPart.Velocity = player.Character.HumanoidRootPart.CFrame.lookVector * 130
			end
			wait(cooldowntime)
			cooldown = false
		end
	end
end)

(please ignore my bad code, this is what worked so i did it)

#2

Use linear velocity instead of velocity.

#3

can you explain? im confused [character filler]