Link to the video (By Jun) if anyone is interested watching it: https://www.youtube.com/watch?v=3XW-XdDe6j0
The mass of the middle size tomato: approximately 120g=0.12kg
width of the tomato touches the bevel: approximately 7cm=0.07m
The width of the eage of the bevel: searched online and found that a regular new knife for kitchen is arrroximately 20mm, depending on different brand, materials used, and manufacturers, etc. I will take 20mm=0.00002m
Therefore, the pressure the bevel has from the tomato is
Since the pressure we got is quite large, it proofs the phenomenon that the tomato can 'cut itself by its' gravity.
However, after researching online, I found out that the sharpness is also related to the angle of the edge of the blade. The performance also relates to the angle of cutting. For this video, the the information we can access is fairy limited so possible we could extend out eyes into angles of the bevel in relation to the cutting performance, for example.