IOM 2019, Блиц — Задача 16

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

Условие

A 5 kg ball is thrown down from a 10 m height with a speed of 6 m/s. The ball bounces back half of its initial height. How much energy did the ball lose due to the impact with the ground? Air resistance is negligible.

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