How do i add knockback

Help and Feedback Scripting Support
#1

hi, i made a script that will be the barge, like in soccer.
so i want that when i touch the player, it gets knockback backwards.
here is a video on how it is


here the script

local debris = game:service("Debris")
bin = script.Parent
Go = script.Parent.Parent.Kick
Go1 = script.Parent.Parent.BKick
Go.Value = 0
Go1.Value = 0
local deb = false
Kick = false
function onKeyDown(key)
	if Go.Value == 1 then return end
	if Go1.Value == 1 then return end
	if key ~= nil then
		key = key:lower()
		if key == "e" then
			Go.Value = 1
			Go1.Value = 1
			if script.Parent.Parent.Parent.Character == nil then return end
			if script.Parent.Parent.Parent.Character:findFirstChild("Right Arm") == nil then return end
			local character = script.Parent.Parent.Parent.Character
			RA = script.Parent.Parent.Parent.Character["Right Arm"]
			local hum = script.Parent.Parent.Parent.Character:WaitForChild('Humanoid')
			local anim = Instance.new("Animation")
			anim.AnimationId = 'rbxassetid://9402175353'
			hum:LoadAnimation(anim):Play()
			Kick = true
			RA.Touched:connect(function(hit)
				if Kick == false then return end
				if hit.Locked == true or hit.Anchored == true then return end
				Kick = false
				deb = true
				if Go.Value == 1 then
					if deb == true then
						if hit.Parent:WaitForChild("Humanoid") == nil then return end                                           
						local lhum = hit.Parent:WaitForChild('Humanoid')
						local anima = Instance.new("Animation")
						anima.AnimationId = 'rbxassetid://9402179653'
						lhum:LoadAnimation(anima):Play()
							deb = false
					end
				end
			end)
			wait(0.2)
			Kick = false
			wait(2.5)
			Go.Value = 0
			Go1.Value = 0
		end
	end
end

bin.Deselected:connect(function()
end)
function onSelected(mouse)
	mouse.KeyDown:connect(onKeyDown)
end

bin.Selected:connect(onSelected)

can you help me?

#2 
local hrp = -- path to the humanoid root part that you want to knockback
local hittershrp = -- path to your humanoid root part
local Speed = -- Speed
hrp.Velocity = hittershrp.CFrame.LookVector * Speed
#3

thank you so much for the help, it works!