IOM 2021, Блиц — Задача 40

The Blitz-contest of IOM-2021

Условие

A toy train is moving in a circle with radius of 11 m and speed of 1010 m/s. There is a source of sound at d=0.2d = 0.2 m from the center of the circle, which is playing a constant sound with the frequency of 1010 kHz. There is a microphone in the train. What is the maximum frequency (in Hz, rounded to integer) of sound detected by the microphone? The speed of sound is 340340 m/s.

A circle of radius R = 1 m centred at A along which the train moves; the train is at the right end of the circle with velocity V = 10 m/s pointing up; the source is at distance d = 0.2 m from A, surrounded by dashed concentric wavefronts.

Отговори

Решение

Оригинал в Архива: iom-2021-blitz-tasks-eng.pdf · официални решения: iom-2021-blitz-answers-eng.pdf