IOM 2018, Блиц, английски — Задача 80

OLYMPIAD OF METROPOLISES. Moscow, September 3 · 3 септември 2018 г.

Условие

There is a weight on a smooth plane inclined at an angle of $\alpha = 30^{\circ}$ to the horizon. At what horizontal acceleration should one move the plane to prevent the weight from sliding?

The answer should be given in the SI units unless otherwise stated. If the numerical result turns out to be an integer, it should be given as the answer. Otherwise round the result to the first decimal. $g = 10\ \mathrm{m/s^2}$.

Отговори

Решение

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Оригинал в Архива: blitz.pdf · официални решения: blitz-answers.pdf