IOM 2016, Блиц — Задача 17

Olympiad of Metropolises, Moscow. Blitz Contest, September, 5 · 5 септември 2016 г.

Условие

The answer should be given in SI-units and rounded to the nearest integer, unless otherwise is stated. $g = 10$ m/s$^2$.

A ball is dropped from a height h without initial speed. At height $y<h$, it bounces elastically (i.e., at the same speed) off a board in the horizontal direction. The height y is chosen so that the distance of ball flight in horizontal direction is maximal. Determine this distance in the units of h.

Решение

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Оригинал в Архива: blitz.pdf