IOM 2018, Блиц, английски — Задача 72

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

Условие

A jet of water leaves a hose and hits a wall where its velocity becomes zero. If the hose cross-sectional area is 25 cm$^2$, the velocity of water is 50 m/s and the density of water is 1000 kg/m$^3$, what is the force acting on the wall (in Newtons)?

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

---

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