USAAAO 2022, I кръг — Задача 3

USAAAO 2022 - First Round · 5 февруари 2022 г.

Условие

Consider the following elliptical orbit of a comet around a star:

An ellipse with its major axis drawn horizontally and its minor axis vertically; a yellow disc labelled 'Star' lies on the major axis left of the centre (at a focus); blue points B at the top and A at the bottom end of the minor axis.

Which of the following expressions corresponds to the time that the comet takes to go from point A to point B as a function of the period of the comet (TT) and the eccentricity of the orbit (ee)?

Assume that the direction of the orbit is counterclockwise.

(a) T2\frac{T}{2}

(b) (eπ+12)∗T\left(\frac{e}{\pi} + \frac{1}{2}\right) * T

(c) (12−eπ)∗T\left(\frac{1}{2} - \frac{e}{\pi}\right) * T

(d) (1+e)∗T2(1 + e) * \frac{T}{2}

(e) T∗e2\frac{T * e}{2}

Отговори

Решение


Оригинал в Архива: usaaao_first_exam_2022_problems.pdf · официални решения: usaaao_first_exam_2022_solutions-1.pdf