IYPT 2007, Задачи на турнира — Задача 4. Spring thread

PROBLEMS FOR THE IYPT 2007

Original notice

Important: the problems were intended for the IYPT and may be subject of copyright

Условие

Pull a thread through the button holes as shown in the picture. The button can be put into rotating motion by pulling the thread. One can feel some elasticity of the thread. Explain the elastic properties of such a system.

Original button and doubled thread arrangement.

Решение

Внимание: Непълно решение

В архива няма официално решение на тази задача.

Оригинал в Архива: 2007.pdf