https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:forces/x0e04e0cb682fb793:action-and-reaction-force/v/newtons_third_law 2024-07-01T11:54:52.194339821Z Newton's third law Newton's third law states that forces always exist in equal and opposite pairs. One object cannot exert a force on another without experiencing an equal magnitude force in the opposite direction. Newton's third law applies even if the two interacting objects have different masses. The equal and opposite forces in the pair do not cancel because they act on different objects. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/5703fb4b-e023-44f7-9057-cb37e008f174_1280_720_base.png Newton's third law Newton's third law states that forces always exist in equal and opposite pairs. One object cannot exert a force on another without experiencing an equal magnitude force in the opposite direction. Newton's third law applies even if the two interacting objects have different masses. The equal and opposite forces in the pair do not cancel because they act on different objects. https://cdn.kastatic.org/ka-youtube-converted/J8mLQQZeIH8.mp4/J8mLQQZeIH8.mp4 627 Action and Reaction Force https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:forces/x0e04e0cb682fb793:action-and-reaction-force/a/forces-and-newtons-third-law 2026-05-01T13:40:34.883034315Z Learn and try: Forces and Newton's third law Forces always exist in pairs. Explore how the forces in these pairs compare to each other, and why they don't balance each other. article https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:forces/x0e04e0cb682fb793:action-and-reaction-force/v/newtons-third-law 2025-07-01T10:10:08.145512912Z Newton's third law Forces result from interactions between objects. Newton's third law states that two interacting objects exert equal and opposite forces on each other. Each object in the pair experiences one of the forces in the pair. The forces in the pair have equal strengths even if the two interacting objects have different masses or speeds. The forces in the pair don't balance each other because they act on two different objects. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/ed233176-22c8-47e9-a20e-3216d02adf0d_1280_720_base.png Newton's third law Forces result from interactions between objects. Newton's third law states that two interacting objects exert equal and opposite forces on each other. Each object in the pair experiences one of the forces in the pair. The forces in the pair have equal strengths even if the two interacting objects have different masses or speeds. The forces in the pair don't balance each other because they act on two different objects. https://cdn.kastatic.org/ka-youtube-converted/9ViLDdSTrMU.mp4/9ViLDdSTrMU.mp4 398 Action and Reaction Force https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:forces/x0e04e0cb682fb793:action-and-reaction-force/a/what-is-newtons-third-law 2026-05-01T14:10:52.97313295Z Learn and try: Systems and Newton's third law Learn about the equal and opposite forces that interacting objects exert on each other. Explore the difference between internal and external forces acting on a system. article https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:forces/x0e04e0cb682fb793:action-and-reaction-force/e/understand-newton-s-third-law 2025-05-15T14:00:50.502015404Z Understand: Newton's third law Check your understanding of Newton's third law in this set of free practice questions. Emily Cizmas exercise https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:forces/x0e04e0cb682fb793:action-and-reaction-force/e/apply-newton-s-third-law 2025-05-15T14:03:24.337359585Z Apply: Newton's third law Apply your knowledge of Newton's third law in this set of free practice questions. Emily Cizmas exercise https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:forces/x0e04e0cb682fb793:action-and-reaction-force/v/action-and-reaction-forces 2024-01-04T21:41:56.674101033Z Action and reaction forces Newton's third law of motion states that every force has an equal and opposite reaction force. This law is demonstrated through examples like a plane flying by pushing air particles, a rocket launching, and an astronaut moving in space. It's also explained how these forces affect us in everyday life and in the universe. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/db2a6323-28e9-4e95-96ab-091fb7be9b6d_1280_720_base.png Action and reaction forces Newton's third law of motion states that every force has an equal and opposite reaction force. This law is demonstrated through examples like a plane flying by pushing air particles, a rocket launching, and an astronaut moving in space. It's also explained how these forces affect us in everyday life and in the universe. https://cdn.kastatic.org/ka-youtube-converted/Hm7B-xXJ1uM.mp4/Hm7B-xXJ1uM.mp4 292 Action and Reaction Force https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:forces/x0e04e0cb682fb793:action-and-reaction-force/a/action-and-reaction-forces 2022-04-29T01:09:37.863682202Z Action and reaction forces Review your understanding of action and reaction forces in this free article aligned to NGSS standards. article