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:

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 () and the eccentricity of the orbit ()?
Assume that the direction of the orbit is counterclockwise.
(a)
(b)
(c)
(d)
(e)
Отговори
- B
Решение
When the comet goes from point A to point B, it sweeps out the area marked in red in the the following figure:

Using Kepler’s Second Law:
Note: In the calculations, the semi-major axis was denoted by and the semi-minor axis was denoted by .
Answer: B
Оригинал в Архива: usaaao_first_exam_2022_problems.pdf · официални решения: usaaao_first_exam_2022_solutions-1.pdf