How would I go about changing the Local Player's physical properties?

I want to be able to change the physical properties of each limb on the local player, except I don't know how to properly locate the Player's limbs correctly. I have tried simple things like

local player = game:GetService("Players").LocalPlayer
local character = player.Character

character.Head.Friction = 0

But that didn't really work.

Any help would be appreciated.