IYPT 2011, Задачи на турнира — Задача 15. Slow descent

24th IYPT (2011)

Заглавие в източника

Source: Problems for IYPT 2011 (iypt.org, July 17, 2010)
Selected at the IOC meeting in Gössing on July 16—17, 2010
Reference Kit for 2011 (final edition, July 29, 2011) →
Exemplary solutions for 2011 →

Условие

Design and make a device, using one sheet of A4 80 gram per m2 paper that will take the longest possible time to fall to the ground through a vertical distance of 2.5 m. A small amount of glue may be used. Investigate the influence of the relevant parameters.

Решение

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Оригинал в Архива: 2011.txt