Motion, forces, and energy | Physics | Khan Academy - Work and power | Physics | Khan Academy

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/science/highschool-physics/x6679aa2c65c01e53:energy/x6679aa2c65c01e53:work-and-power/v/work_and_power Want to explore more? Check out the full energy & work playlist here: https://www.youtube.com/playlist?list=PLSQl0a2vh4HA528Zyvlu2giom7XkHj_OM Work is energy transferred to or from an object via force. If a net force acts in the same direction an object is moving, it does positive work on the object (kinetic energy increases). If a net force acts in the opposite direction an object is moving, it does negative work on the object (kinetic energy decreases). Power is the rate that work is done, or equivalently, the rate that energy is transferred. Sections: 00:00 - Intro 00:24 - Understanding work 02:34 - Positive, negative, and zero work 06:05 - Work-energy theorem 08:07 - Power 10:41 - Electrical power and energy (kilowatt-hours) 12:02 - Launched roller coasters ------------------ 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