IOM 2018, Блиц, английски — Задача 14

OLYMPIAD OF METROPOLISES. Moscow, September 3 · 3 септември 2018 г.

Условие

A small mass is sliding without friction along the looped track shown in the Figure. It detaches from the loop at some point AA and during the flight passes through the center OO of the loop. What is the angle α\alpha (in degrees)?

A track descending from the left onto a horizontal hatched floor and forming a vertical circular loop; the centre O lies on a vertical dashed line, and the radius to point A on the upper right of the loop makes the angle α with the vertical.

Отговори

Решение

Оригинал в Архива: blitz.pdf · официални решения: blitz-answers.pdf