Conservation of energy | Middle school physics | Khan Academy

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/ms-physics Want to explore more? Check out the full middle school physics playlist here: https://www.youtube.com/playlist?list=PLSQl0a2vh4HC-daPugvP8kL_zuE3u_3Zr If a system is isolated so that no energy is enters or leaves the system, the total amount of energy in the system remains the same over time. Energy may convert between kinetic and potential, but the total amount is constant. If energy is transferred into or out of the system, the total energy of the system does change. Energy often transfers out of systems as sound and thermal energy. Sections: 00:00 - What is conservation of energy? 00:36 - Potential to kinetic to potential 03:27 - Why doesn't the ball bounce forever? 06:39 - 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