How do I make a part collide with another part but not with players?

I have a part which upholds a moving part. Problem is if I turn the collisions on the part, the moving part just falls. Yet, if I turn the collisions on, people can just walk on it and skip the lobby. How do I make it so that players cannot walk on it yet the moving part doesn't fall? Anchoring the moving part means the moving part stays still, so that's not a solution.

you would have to use the PhysicsService.. The service allows you to place Baseparts and models in a collision group, then you could set weather or not parts in a certain collision group can collide with parts in another collision group..

learn more about physics service here

Insert this into workspace

local part1 = workspace.Part1 --example
local part2 = workspace.Part2 --example

function touch(hit)
	if game.Players:GetPlayerFromCharacter(hit.Parent) then
		part1.CanCollide = false
	else
		part1.CanCollide = true
	end
end

function touch2(hit)
	if game.Players:GetPlayerFromCharacter(hit.Parent) then
		part2.CanCollide = false
	else
		part2.CanCollide = true
	end
end

part1.Touched:Connect(touch)
part2.Touched:Connect(touch2)