Orbits & Gravity Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. A __is one of two fixed points from which an ellipse can be generated:

Question 2 2. Stored energy subject to gravitational attraction by another body is called:

Question 3 3. This is the minimum velocity a body needs to escape the gravitational attraction of a more massive body:

Question 4 4. If a planet has an orbital eccentricity equal to 0.70, then its orbit is:

Question 5 5. If a planet's orbit all of a sudden became more elongated, then:

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Question 6 6. The planets in our solar system all have ___orbits:

Question 7 7. This is the extent to which an orbit deviates from a circle:

Question 8 8. At perihelion:

Question 9 9. At perihelion:

Question 10 10. This is an example of an open curve:

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Question 11 11. An object moving with a speed faster than escape velocity will follow which path?

Question 12 12. In general, what are Kepler's Laws?

Question 13 13. A celestial object moving with a speed equal to escape velocity will:

Question 14 14. At aphelion:

Question 15 15. This is a conic section obtained when a right circular cone is cut by a plane that intersects the cone's axis and surface to produce a closed elongated curve:

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Question 16 16. A planet is orbiting its star at a maximum radius of 1.2 x 10^7 meters. If the mass of the star is 2 x 10^30 kg, and the current radius is 0.9 x 10^7 meters, what is the velocity of the orbit?

Question 17 17. Which of the following orbital eccentricities is NOT an elliptical orbit?

Question 18 18. A planet is orbiting its star at a maximum radius of 1.2 x 10^7 meters. If the mass of the star is 2 x 10^30 kg, what is the time period of the orbit?

Question 19 19. What is an elliptical orbit?

Question 20 20. A planet's average distance from the sun is equal to the:

Orbits & Gravity Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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