IYPT 1991, Задачи на турнира — Задача 15. Glider

Problems for the 4th International Young Physicists’ Tournament

Critical edition

Olympiets Youth Center, Moscow, Soviet Union; July 22‒28, 1991 [1]

Critical edition: translated, restored, and commented text [2]

FINAL DRAFT. — Please do not re-publish. Suggestions and criticism welcome

Translated, edited and commented by Ilya Martchenko. The original edition’s historical notes, sources and acknowledgments are retained with problem 1.

Епиграф

Is this black currant?
No, it is red currant.
But why is it white?
Because it is still green. [3]

Условие

Construct a glider that is driven by a piece of soap. Your glider must win in two competitions: in racing against time for a distance of 50 cm and in floating for a longest range in a given direction (separate gliders may be constructed for each competition.) The linear dimensions of the glider may not exceed 6.28 cm. In the second competition, the glider may not carry more than 0.5 g of soap.

Note [22]

Problems “Moon” and “Glider” follow in the opposite order in the 1996 Czech and in the 2006 English text and have there, respectfully, numbers: No. 14 “Glider” and No. 15 “Moon”

Решение

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Оригинал в Архива: 1991.pdf