How would I reduce jittering on this RigidBody2D?

So I have this code where it does what I want by moving the player behind the mouse and having a variable speed depending on how far away it is from the cursor, but it jitters a lot. I don’t understand how I would fix this annoying problem and smooth it out, since I’m new to C#. Could it be because of the AddForce? There might be another was to do this that I don’t know about. I would be very greatful if you could help me understand this, thanks!

	void FixedUpdate () {
		//Follow the mouse
			var pos = Input.mousePosition;
			pos = Camera.main.ScreenToWorldPoint(pos);
			var dir = pos - transform.position;
			rigidbody2D.AddForce(dir * 4);
	}

This little bit in a new code fixed it.

	void Start () {
		rigidbody2D.interpolation = RigidbodyInterpolation2D.Interpolate;

	}