Help with launching item on drop

[GameMaster4268 (Game)]

So I’m trying to launch the tool when the player drops it but my code doesn’t work with mass correctly.

Some objects launch further than others and I need help fixing that. I want the objects to launch the same.

Code:

local function getTotalObjectMass(object)
	local mass = 0

	for i, v in ipairs(object:GetDescendants()) do
		if v:IsA("BasePart") then
			mass += v.AssemblyMass
		end
	end

	return mass
end

local function dropItem(item)
	local head = character:FindFirstChild("Head")

	if item and head then
		local newItem = item:Clone()
		newItem:PivotTo(head.CFrame + head.CFrame.LookVector * 3)
		newItem.Parent = PickupableItems

		local mass = getTotalObjectMass(newItem)

		local launchPower = 50

		local launchDirection = head.CFrame.LookVector
		local launchVelocity = launchDirection * mass * launchPower

		if newItem.PrimaryPart then
			newItem.PrimaryPart.AssemblyLinearVelocity = Vector3.new()
			newItem.PrimaryPart:ApplyImpulse(launchVelocity)
		end
	end
end

All my objects are not massless.

[GAGA12345677 (wPixlerexer)]

@GameMaster4268

newItem.PrimaryPart.AssemblyLinearVelocity = Vector3.new()

newItem.PrimaryPart.AssemblyLinearVelocity = Vector3.new()?
if you really cant find a answer i suggest just using velocity until you find a answer
also you if changing newItem.PrimaryPart.AssemblyLinearVelocity = Vector3.new() doesnt work but changing the velocity works you shouldent mark me as the answer because you should never permanently use deprecated methods