In my opinion, I believe that all matters are knowable as all matters (including mental states and consciousness) are results of material interactions. If everything is created by movement or a certain force, the matter will eventually be knowable when the technology has developed to a certain height.
For example, the person who uses the pulley, through the scientific method of observing and measure, the movement of the man, the weel and the uplifting/lowering object, a pattern of movement by force caused by the person is observable and could come to a conclusion that it’s the movement of the person, who through the pulling action of the bucket, lifts it from the well. Other forces that exist could be also taken into accounts such as air-resistance and etc…
Great, you have managed to submit something. Try to write “In some people’s opinion, … and these people tend to be from within this kind of culture…”. TOK is about discussing knowledge and not just about your own specific opinion. Using etc is not wise in a formal piece of work. It is great to get balance by providing another example that disagrees with each other, clarifying the contexts for each.