Those are balanced. But in the horizontal direction.

现在考虑更多的例子。现在考虑更多的例子。

And you do have two forces that are counteracting on the horizontal direction.

现在考虑更多的例子。

I'll just call that F3 X for F3 in the horizontal direction.

我将水平方向的 F3 称为 F3 X。

There is zero net force going on, there are no forces the way I've drawn it, going on in the horizontal direction.

现在考虑更多的例子。

'Cause gravity's exerting a force in the vertical direction, and our normal force is in the horizontal direction.

因为重力在垂直方向施加力，而我们的法向力在水平方向。