Ahaha! Funny coincidence. I am actually working on a document called "Teaching at the time of AI". There are tools, and we should teaching both students and lecturers how to benefit from them, use them in a clever and ethical way, etc. So very in line with your post :-)
For the physics question... unfortunately I have no time tonight. The problem looks interesting (could be a nice problem for 1st-year or 2nd-year students in physics) and I would start with energy conservation and gravitation forces (obviously for the latter). The issue is that I may need a couple of dozens of minutes to solve that and make sure I am correct, which is a luxury I don't have tonight (I need to review a 550-page document by Friday). Maybe I will handle that next week while flying to Japan (but I guess that by then you will be able to find tons of solutions online).
Note that I cannot find this problem in the arxiv paper on page 5. You need to go to the exam webpage to get it.
Cheers! :-)
No worries! I don't think I will search for answer. My point was, it was not easy for you to answer immediately either.
Yes, I went to exam webpage. My nephew is involved in this project. He is doing a PhD on how AI can learn sarcasm ... I kid you not :)
In fact, the answer is 8 :-)