Thanks Andrew!
So you suggest the answer would be that "Entropy doesn't change" and the process is "reversible"
Right? I am going to confirm that with the Teaching Assistant or the professor himself soon, and if I get something from them, I'll share here :)
Well I thought, the ball kind of stays at the second position. I agree to your theory but again this notion of mechanical work done in this process bugs me a lot. What about the loss in potential energy of the ball?
Note: Note that height h1>h2, the initial height is greater than the final...
Homework Statement
In a closed isolated system, a small rigid ball is held at height h1, which we will call state A. By remote control a pin is pulled and the ball is released. It falls to height h2, called state B. Calculate the change of entropy S of the system. Is it a reversible or...