Am I floating a character wrong?

I'm attempting to make a character float. Here is my script

function getMass(model)
    local weight = 0
    if model:IsA("BasePart") then
        return model:GetMass()
    end
    if #model:GetChildren()>0 then
        for _,v in pairs(model:GetChildren()) do
            weight = weight + getMass(v)
        end
    end
    return weight
end


game.Players.PlayerAdded:connect(function(player)
    player.CharacterAdded:connect(function(character) 
    local character=player.CharacterAppearanceLoaded:Wait()
    local mass = getMass(character)
    local force = Instance.new("BodyForce",character.LowerTorso)
    force.force = Vector3.new(0,196.2*getMass(character),0)
    end)
end)

I'm adding a force in the lower torso equal to 196.2 * the total mass of the character including hats etc. It seems that's too much and the character is rising. I have no idea why.