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Question 2

An astronomical body, $X$ , orbits a star in a highly elliptical orbit with an eccentricity of 0.96. Another body, $Y$ , orbits a planet in a nearly circular orbit. Which of the following correctly classifies bodies $X\,$ and $Y$ , and describes the change in the linear orbital speed of $X\,$ as its distance from the star increases?

$X$ is a moon, $Y$ is a comet, and the orbital speed of $X$ decreases.

$X$ is a comet, $Y$ is a moon, and the orbital speed of $X$ decreases.

$X$ is a comet, $Y$ is a moon, and the orbital speed of $X$ increases.

$X$ is a planet, $Y$ is a moon, and the orbital speed of $X$ remains constant.

Markscheme

Astrophysics Questions

IGCSE
Physics
Astrophysics

Astrophysics

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Astrophysics

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Question 2

$X$ is a moon, $Y$ is a comet, and the orbital speed of $X$ decreases.

$X$ is a comet, $Y$ is a moon, and the orbital speed of $X$ decreases.

$X$ is a comet, $Y$ is a moon, and the orbital speed of $X$ increases.

$X$ is a planet, $Y$ is a moon, and the orbital speed of $X$ remains constant.

Markscheme

Astrophysics Questions

IGCSE
Physics
Astrophysics