Motion, forces, and energy | Physics | Khan Academy - Conservation of momentum | 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:force-pairs-and-momentum/x6679aa2c65c01e53:momentum/v/conservation_of_momentum Want to explore more? Check out the full motion, forces, & momentum playlist here: https://www.youtube.com/playlist?list=PLSQl0a2vh4HCiFE95STYVxTZ6Ep402vfa According to Newton's third law, two interacting objects exert equal and opposite forces on each other. And, according to one form of Newton's second law, the net force on an object is equal to the rate of change of the object's momentum. As a consequence of these two laws, the total momentum of a system of interacting objects is conserved if there is no unbalanced force from outside the system. Sections: 00:00 - Intro 00:36 - Why is momentum conserved? 05:34 - Money analogy 07:56 - Calculating recoil momentum of a canon ------------------ 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