How would I make a part tween towards a part in a curve?

So Here is what I need to do.

I have to positions,
and a part, the part goes from one po to the other right?
But I dont want it do just go straight forward towards the second position,
I want it to curve.

Kind of like with a bow, when you shoot the arrow upwards it goes forward and done.
Or sometimes with rockets. They shoot them upwards and then they go forward and hit there target.
How Would I do this?

For this result I would use bezier curve calculations, then move the object accordingly along the curve.