Съдържание

Условие Решение

IYPT 1990, Задачи на турнира — Задача 7. Cylinder in a tube

Оригинал на условието (PDF)Съобщи за грешка

Всички материали от IYPT 1990

Problems for the 3rd International Young Physicists’ Tournament

Critical edition

Olympiets Youth Center, Moscow, Soviet Union; June 7‒14, 1990 [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

Victories do not attract him.
For him growth means: profound defeat
at the hands of ever greater adversaries.
R. M. Rilke [3]

Условие

A cylinder is moving towards the closed end in a long tube filled with water (Fig. 3).

Original cylinder moving at speed v toward the closed left end of a water-filled tube.

The inner diameter of the tube is D, diameter of the cylinder is d, the cylinder length is L, $D-d=h$ , $L>D$ , $h\ll D$ . How does the resistance force depend on the speed of cylinder? Compare the theoretical estimations with the experimental results.

Решение

Внимание: Непълно решение

В архива няма официално решение на тази задача.

Оригинал в Архива: 1990.pdf