Help with bodyposition and bodyvelocity and bodyforce?

I'm trying to make a throwable tool in roblox where you can throw the item and pick it up again. I really don't understand body position etc. I've kinda made a little bit of a script but I don't really get the gist of it.

local Tool = script.Parent
local BodyVel = Instance.new("BodyVelocity")
local BodyFor = Instance.new("BodyForce")
local BodyPos = Instance.new("BodyPosition")


Tool.Equipped:Connect(function()
    Tool.Activated:Connect(function()
      local Target = game.Players.LocalPlayer.MouseHit.Position

  end)
end)

A couple of steps for what to door a nudge in the right direction would be appreciated!