Question

question: 5
at which labeled interval of its orbit would the planet move with the greatest velocity?
a
b
c
d

Explanation:

Step1: Recall Kepler's second law

Kepler's second law states that a line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time.

Step2: Analyze the relationship between distance and velocity

When a planet is closer to the Sun (perihelion), it must move faster to sweep out the same area as when it is farther away (aphelion) in the same time.

Step3: Identify the closest interval to the Sun

Looking at the diagram, interval A is the closest to the Sun.

Answer:

A. A