The figure below shows a planet traveling in a clockwise direction on an elliptical patharound a star located at one focus of the ellipse. When the planet is at point A,STARits speed is constant.its speed is increasing.its speed is decreasing.its speed is a maximum.its speed is a minimum.

Answered: The figure below shows a planet…

Applications and Investigations in Earth Science (9th Edition)

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

Section: Chapter Questions

Problem 1LR

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The figure below shows a planet traveling in a clockwise direction on an elliptical path
around a star located at one focus of the ellipse. When the planet is at point A,
STAR
its speed is constant.
its speed is increasing.
its speed is decreasing.
its speed is a maximum.
its speed is a minimum.

Expert Solution

Introdution.

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

This essentially means that as the object approaches near the star it needs to cover lesser distance on its orbit, therefore attains a greater speed. Whereas, as the object moves away from the star, it requires to cover a greater distance, therefore has a slower speed. The time period being fixed, as the area varies, hence the speed varies.