Now, even though the tangential velocity points this way, because this particle is suspended inside a fluid, that fluid will create a force, will exert a force on that particle. And this is the force that creates the centripetal acceleration of that object, of the particle that makes it move in a nearly circular fashion. Now, the reason the particle doesn't actually move in a perfect circle is because the particle has inertia. And because of the inertia of that particle, that will create a slight motion that will point outward. And so if we follow a perfect circle from position one to position two, this is where that particle should technically end up. But because of the inertia of our object, of that particle, that inertia will resist that force.