IOM 2018, Блиц, английски — Задача 62

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

Условие

A 0.2 kg ball is dropped from a height $h = 10$ m at an initial velocity $v = 10$ m/s. It bounces back to the initial height. How much energy was lost during the collision with the ground? (Neglect the air resistance).

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