How do I use vector forces on a humaniod

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1

Currently this is how its set up rn its a place holder but it just doesn’t work how would i fix it, its in starter character scripts

-- Services
local input = game:GetService("UserInputService")
local player = game:GetService("Players")

-- Variables
local player = player.LocalPlayer
local character = player.Character or player.CharacterAdded:wait()
local humaniod = character:FindFirstChild("Humanoid")

-- Speeds
local walkSpeed = 14
local sprintSpeed = 28
local state = "walk"
local rolling = false
local rollDebounce = false
local rollTime = 1

-- Sprinting
input.InputBegan:Connect(function (key)
	if key.KeyCode == Enum.KeyCode.LeftShift then
		if humaniod then	
			character.Humanoid.WalkSpeed = sprintSpeed
			state = "sprint"
		end
	end
end)

input.InputEnded:Connect(function (key)
	if key.KeyCode == Enum.KeyCode.LeftShift then
		if humaniod then	
			character.Humanoid.WalkSpeed = walkSpeed
			state = "walk"
		end
	end
end)

-- Rolling
input.InputBegan:Connect(function(key)
	if key.KeyCode == Enum.KeyCode.C and state == "sprint" and rollDebounce == false then
		if humaniod then
			print("roll")
			rollDebounce = true
			rolling = true
			task.wait(rollTime)
			rolling = false
			rollDebounce = false
		end
	end
end)

-- Crouching

input.InputBegan:Connect(function(key)
	if key.KeyCode == Enum.KeyCode.C and state == "walking" then
		if humaniod then
			local attachment = Instance.new("Attachment" , humaniod)	
			local force = Instance.new("VectorForce" , humaniod)
			force.Attachment0 = attachment
			force.Force = (Vector3.new(0,1,0)).Unit * 10000
			force.RelativeTo = Enum.ActuatorRelativeTo.Attachment0
		end
	end
end)