Where can I access 2024 admission problems? I really like these internship programs however since I am not from Italy, I cannot attend them in person.

Amazing!

Pigkappa ha scritto: ↑9 set 2023, 20:31 What's the problem statement for the 1987 problem?

Here ya go: https://earthz.ru/solves/Zadacha-po-fizike-6534

Alright!

I agree completely with Pigkappa. I dont understand why a difference of level between A and B changes the angle O. As if we rotate with an axis for Z The problem which I had solved had explicitly mentioned that AB = radius of the circle. This confirms my theory. The solution you offered is correct ...

Interestingly, this document from an American competition, in problem 2, reports your same result, without proof. But... I am still confused :shock: in the problem I posted, \rho_0 = R / \sqrt 2 and the result is v(1+\sqrt 2) , isn't it? Here is why I think \rho_0 = R / \sqrt 2 ... Adding a point Z...

According to the condition of the problem, the ball rolls without slipping, therefore, the speeds of those points of the ball that at a given moment of time touch the metal at AB (Fig.) are equal to zero. Considering the ball to be an absolutely rigid body (that is, the distance between any two poi...

Higgs ha scritto: ↑9 set 2023, 18:10 I agree completely with Pigkappa. I dont understand why a difference of level between A and B changes the angle O. As if we rotate with an axis for Z

The problem which I had solved had explicitly mentioned that AB = radius of the circle.

According to the condition of the problem, the ball rolls without slipping, therefore, the speeds of those points of the ball that at a given moment of time touch the metal at AB (Fig.) are equal to zero. Considering the ball to be an absolutely rigid body (that is, the distance between any two poi...

One crucial error which I think you are making is by assuming that A and B are on the same level. They are not. If A and B aren't on the same level, then you cannot assume angle O to be 90 degrees. In that case (as mentioned in original problem from Kvant), the triangle will be equilateral with each...