Is there any way to have certain parts be affected by AssemblyLinearVelocity more?

[HarsonistTheArsonist (Harsonist)]

So currently in my game I have one of those simple conveyor belts setup, ie. the ones where you make a parts linearassemblyvelocity set to the speed and direction you want a part to move in

What do I want to achieve: Ideally id like to have certain parts be affected by the linear velocity more, say I have an object that is “lighter” I would like it to zip down the conveyor belt 2x faster

What is the issue: I cant seem to find the proper setting on a part to make this happen. The best thing ive got is putting a script on said part and manually making part.AssemblyLinearVelocity = Vector3.new(0,0,-36) - which works for a split second but then it reverts to the assemblylinearvelocity

What ive tried: Ive tried changing the assemblymass which seems to do nothing, ive tried making the part massless, ive tried playing with the physical properties but nothing appears to work. I really dont want to make a while loop and constantly set the velocity but i guess ill have to if theres no other way

[Ziffixture (Ziffix)]

It would not be physically accurate to have lighter objects travel faster on a single platform that is moving at a uniform speed. I can’t think of many convenient ways to approach your problem, but I would personally avoid imparting a velocity on the conveyor. Instead, you would impart the velocity onto the objects on the conveyor with respect to the conveyor and the function for increasing velocity based on weight

[TheScripterLad]

Tested this and it works, and is better than using a script in each part.

local conveyor = script.Parent

-- Configure speeds for parts based on their names
local SpeedOfParts = {
	["Fast"] = Vector3.new(10, 0, 0),
	["Slow"] = Vector3.new(2, 0, 0),  
}

local partsOnConveyor = {}

local function applyVelocity(part)
	if part:IsA("BasePart") and part.CanCollide then
		local speed = SpeedOfParts[part.Name]
		part.AssemblyLinearVelocity = speed
	end
end

local function resetVelocity(part)
	if part:IsA("BasePart") then
		part.AssemblyLinearVelocity = Vector3.zero
	end
end

conveyor.Touched:Connect(function(otherPart)
	if not partsOnConveyor[otherPart] then
		partsOnConveyor[otherPart] = true
		applyVelocity(otherPart)
	end
end)

conveyor.TouchEnded:Connect(function(otherPart)
	if partsOnConveyor[otherPart] then
		partsOnConveyor[otherPart] = nil
		resetVelocity(otherPart)
	end
end)

game:GetService("RunService").Stepped:Connect(function()
	for part in pairs(partsOnConveyor) do
		if part.Parent then
			applyVelocity(part) 
		else
			partsOnConveyor[part] = nil 
		end
	end
end)

Hopefully this helps.