Lesson: Gravitational Potential Energy in Radial Gravitational Fields
In this lesson, we will learn how to calculate the kinetic energy, gravitational potential energy, and total energy of objects with orbital trajectories.
Sample Question Videos
Worksheet: 5 Questions • 2 Videos
Assuming a circular orbit for the Sun about the centre of the Milky Way Galaxy, calculate its orbital speed. The mass of the galaxy is equivalent to a single mass that is times that of the Sun’s mass, which is kg, located at a distance of ly from the Sun.
There are two planets in orbit around a star. Both planets have circular orbits. Planet has a speed of , and Planet has a speed of . (Give your answers to these questions as a decimal if necessary.)
What is the ratio of the orbital radii of the two planets, ?
What is the ratio of the orbital periods of the two planets, ?
The asteroid Vesta has a mass of kg and a radius of 520 km. What would be the orbital period for a space probe in a circular orbit of 10.0 km from Vesta’s surface?