Khan Academy 11d ago

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now. https://www.khanacademy.org/science/ap-college-physics-1 In circular and elliptical orbits, the satellite-central-object system’s total mechanical energy is constant. In elliptical orbits, the system’s gravitational potential energy and the satellite’s kinetic energy both change while the total remains constant. The total energy of a system consisting of a satellite orbiting a central object in a circular path can be written in terms of the gravitational potential energy of that system or the kinetic energy of the satellite. The escape velocity of a satellite is the satellite’s velocity such that the mechanical energy of the satellite-central-object system is equal to zero. Sections: 00:00 - Intro 00:47 - Expression for energy 04:47 - Energy in circular orbits 09:31 - Bound systems 11:17 - Escape speed 13:25 - Unbound systems 15:00 - Summary ------------------ Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc