https://www.khanacademy.org/science/revision-term-1-ka-science-grade-9/x07cce91f26fedd3c:week-3/x07cce91f26fedd3c:force-laws-of-motion/v/newtons-third-law-of-motion 2025-05-29T08:44:44.739717086Z Newton's third law of motion Newton's third law states that for every action there is an equal and opposite reaction. The "action" and "reaction" refer to forces; if Object A exerts a force on Object B, then Object B exerts an equal amount of force on Object A in the opposite direction. Examples include pushing an object, stepping on the ground, and rockets. Dubverse video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Newton's third law of motion Newton's third law states that for every action there is an equal and opposite reaction. The "action" and "reaction" refer to forces; if Object A exerts a force on Object B, then Object B exerts an equal amount of force on Object A in the opposite direction. Examples include pushing an object, stepping on the ground, and rockets. https://cdn.kastatic.org/ka-youtube-converted/pPhHSF0Teyg.mp4/pPhHSF0Teyg.mp4 480 Newton's third law https://www.khanacademy.org/science/in-in-class11th-physics/in-in-class11th-physics-laws-of-motion/in-in-class11-newtons-third-law/e/newton-s-third-law 2026-03-25T13:20:47.939559562Z Identifying equal and opposite forces Practice identifying the correct reaction to an action using Newton's third law.  Sean Boston exercise https://www.khanacademy.org/science/bmc-grade-9-science/x345505a97fc4a662:laws-of-motion/x345505a97fc4a662:newton-s-laws-of-motion/v/more-on-newtons-third-law-dubv 2025-05-29T08:44:44.739717086Z More on Newton's third law Newton's third law states that objects exert equal and opposite forces on each other in every interaction. However, these forces do not cancel out because they act on two different objects. The magnitudes of the forces on both objects will be always be equal, but their resulting accelerations will not be equal if the objects have different masses. Dubverse video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw More on Newton's third law Newton's third law states that objects exert equal and opposite forces on each other in every interaction. However, these forces do not cancel out because they act on two different objects. The magnitudes of the forces on both objects will be always be equal, but their resulting accelerations will not be equal if the objects have different masses. https://cdn.kastatic.org/ka-youtube-converted/YfYfgT3rJqo.mp4/YfYfgT3rJqo.mp4 786 Newton's third law https://www.khanacademy.org/science/in-in-class11th-physics/in-in-class11th-physics-laws-of-motion/in-in-class11-newtons-third-law/e/newtons-third-law 2026-03-25T13:20:47.939559562Z Newton's third law of motion Conceptual question testing understanding of Newton's Third Law of Motion Sal Khan exercise