IOM 2017, Блиц — Задача 16

OLYMPIAD OF METROPOLISES. Moscow, September 4 · 4 септември 2017 г.

Условие

A trolley of a mass of 400 kg begins to move from the state of rest. During its motion different forces are acting on it, so that the net force uniformly increases from 0 to 80 N in 10 seconds. Determine the trolley speed 10 seconds after it started to move.

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: answers-blitz.pdf