https://www.khanacademy.org/science/in-in-class11th-physics/in-in-class11th-physics-work-energy-and-power/in-in-class11th-physics-work-energy-and-power-elastic-and-inelastic-collisions/v/solving-elastic-collision-problems-the-hard-way 2021-04-07T11:00:40Z Solving elastic collision problems the hard way In this video, David shows how to solve elastic problems the hard way. In other words, using conservation of momentum and conservation of kinetic energy, David substitutes one equation into the other and solves for the final velocities. David SantoPietro video https://cdn.kastatic.org/googleusercontent/qCtKzbiCHiEpTa_eNUFvSlfmUjW7Sjk1KYk_9k3LS8G4x1cikC_dGF4mY94Vp-nY0-iUeOaGX1D9vvBKO980ADlQ Solving elastic collision problems the hard way In this video, David shows how to solve elastic problems the hard way. In other words, using conservation of momentum and conservation of kinetic energy, David substitutes one equation into the other and solves for the final velocities. https://cdn.kastatic.org/ka-youtube-converted/9yXrEZy5WME.mp4/9yXrEZy5WME.mp4 946 Analysis of elastic collisions and conservation laws https://www.khanacademy.org/science/in-in-class11th-physics/in-in-class11th-physics-work-energy-and-power/in-in-class11th-physics-work-energy-and-power-elastic-and-inelastic-collisions/e/elastic-and-inelastic-collision-in-2d 2025-05-22T20:00:19.681517034Z Elastic and Inelastic Collision in 2D Elastic and Inelastic Collision in 2D Chandan Ganotra exercise https://www.khanacademy.org/science/in-in-class11th-physics/in-in-system-of-particles-and-rotational-motion/in-in-rotational-kinetic-energy/v/rotational-kinetic-energy 2021-02-07T17:14:00Z Rotational kinetic energy David explains what rotational kinetic energy is and how to calculate it. David SantoPietro video https://cdn.kastatic.org/googleusercontent/zuYqWfM4JUC5Wd3UvNMArWHgPsVChdBUXjbk28ercjoFh2N-KXaGarixUvJ4M7zcPc5sthlf1gVkHa0IIBzq6EzS Rotational kinetic energy David explains what rotational kinetic energy is and how to calculate it. https://cdn.kastatic.org/ka-youtube-converted/o7_zmuBweHI.mp4/o7_zmuBweHI.mp4 843 Analysis of elastic collisions and conservation laws https://www.khanacademy.org/science/ap-college-physics-1/xf557a762645cccc5:energy-and-momentum-of-rotating-systems/xf557a762645cccc5:rotational-kinetic-energy/v/rolling-without-slipping-problems 2025-01-25T17:06:55.244856264Z Rolling without slipping Learn how to solve problems where an object rolls without slipping. David SantoPietro video https://cdn.kastatic.org/googleusercontent/Y5MQrKC5OTpYisJa5Uz_1F-gkdkssg8vzSqHvRfQdT9S7dE0zjE_QB48XAtBVk7QUTXxPoLIr1mWBRQXxbSSfUS5 Rolling without slipping Learn how to solve problems where an object rolls without slipping. https://cdn.kastatic.org/ka-youtube-converted/5eX5WnPDnvs.mp4/5eX5WnPDnvs.mp4 900 Analysis of elastic collisions and conservation laws https://www.khanacademy.org/science/ap-college-physics-1/xf557a762645cccc5:energy-and-momentum-of-rotating-systems/xf557a762645cccc5:rotational-kinetic-energy/e/rotational-kinetic-energy-exercises-ap1 2026-04-08T15:32:51.709625839Z Rotational kinetic energy and rolling Check your understanding of rotational kinetic energy and rolling in this set of free practice questions. April Russell exercise https://www.khanacademy.org/science/in-in-class-11-physics-cbse-hindi/in-in-11-work-energy-and-power-hindi/elastic-and-inelastic-collisions-hindi/a/what-are-elastic-and-inelastic-collisions 2021-07-03T07:15:28Z What are elastic and inelastic collisions? Collisions can be elastic or inelastic. Learn about what's conserved and not conserved during elastic and inelastic collisions. article https://www.khanacademy.org/science/in-in-class11th-physics/in-in-class11th-physics-work-energy-and-power/in-in-class11th-physics-work-energy-and-power-elastic-and-inelastic-collisions/v/deriving-the-shortcut-to-solve-elastic-collision-problems 2021-04-07T11:00:39Z Deriving the shortcut to solve elastic collision problems In this video, David derives the expression that we can use as a shortcut to solve for finding the velocities in an elastic collision problem. David SantoPietro video https://cdn.kastatic.org/googleusercontent/SRTRx2sLlOPIGw8zK9Qnm9G-8lLTCHJJ5LLP6uHOjW3om0cnLQJ1-hqZ06rGAkyn8TSwMEMf8QVRM1bvJ3h7_4ty Deriving the shortcut to solve elastic collision problems In this video, David derives the expression that we can use as a shortcut to solve for finding the velocities in an elastic collision problem. https://cdn.kastatic.org/ka-youtube-converted/OTtI4urvgDg.mp4/OTtI4urvgDg.mp4 742 Analysis of elastic collisions and conservation laws https://www.khanacademy.org/science/in-in-class-11-physics-cbse-hindi/in-in-11-work-energy-and-power-hindi/elastic-and-inelastic-collisions-hindi/a/inelastic-collisions-ap1 2021-04-29T07:49:17Z Inelastic collision review Review the key concepts and skills for inelastic collisions.  Understand how to determine if a collision is elastic or inelastic. article https://www.khanacademy.org/science/in-in-class11th-physics/in-in-class11th-physics-work-energy-and-power/in-in-class11th-physics-work-energy-and-power-elastic-and-inelastic-collisions/v/how-to-use-the-shortcut-for-solving-elastic-collisions 2021-04-08T13:40:52Z How to use the shortcut for solving elastic collisions In this video, David solves an example elastic collision problem to find the final velocities using the easier/shortcut approach. David SantoPietro video https://cdn.kastatic.org/googleusercontent/pVIAb0v1dj5XC_5NQ8dDCOVM56z5Te-z_-AbNGW6CK70ExjckrT3pF4l7Uw5N55D9pEtea4sfGe8ICocN74h21OUDQ How to use the shortcut for solving elastic collisions In this video, David solves an example elastic collision problem to find the final velocities using the easier/shortcut approach. https://cdn.kastatic.org/ka-youtube-converted/okFcjFD5umU.mp4/okFcjFD5umU.mp4 620 Analysis of elastic collisions and conservation laws https://www.khanacademy.org/science/in-in-class-11-physics-cbse-hindi/in-in-11-work-energy-and-power-hindi/elastic-and-inelastic-collisions-hindi/a/elastic-collisions-ap1 2021-04-29T08:03:20Z Elastic collisions review Review the key concepts, equations, and skills for elastic collisions, including how to predict objects' final velocities. article