IYPT 1994, Задачи на турнира — Задача 4. Upper boundary

7th IYPT (1994)

Условие

Gravitation machine (problems 4, 5, 6). A horizontal plate (a vibrator) oscillates harmonically up and down. A steel ball put an the surface of the plate starts jumping higher or lower. For the experimental device one may successfully use a ferrite core in a coil connected to an alternating current generator (a sound generator). The butt-end of the ferrite core will play the part of the vibrating horizontal plane. Steel balls of diameter 1 or 2 mm are suitable for the experiment. The glass tube approximately 1 m long can also be very helpful.

Measure experimentally the maximum height to which the ball rises to and explain the result.

Решение

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Оригинал в Архива: 1994.txt