IOM 2019, Блиц — Задача 1

OLYMPIAD OF METROPOLISES, Moscow, September 2, 2019 · 2 септември 2019 г.

Условие

A sled starts sliding on a horizontal section of a road under the influence of constant force of 150 N directed at an angle of $60^{\circ}$ to the horizontal. After the first 10 m covered by the sled, its kinetic energy increased by 200 J. Determine the magnitude of the friction force acting on the sled.

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. $g = 10\ \mathrm{m/s^2}$.

Решение

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Оригинал в Архива: blitz-en-all-task-final.pdf