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 Newton's Third Law of Motion https://www.khanacademy.org/science/ms-physics/x1baed5db7c1bb50b:motion-and-forces/x1baed5db7c1bb50b:forces/e/understand-action-and-reaction-forces 2026-05-01T13:40:34.883034315Z Understand: Forces and Newton's third law Check your understanding of forces and Newton's third law in this set of free, standards-aligned practice questions. Khan Academy exercise https://www.khanacademy.org/science/ms-physics/x1baed5db7c1bb50b:motion-and-forces/x1baed5db7c1bb50b:forces/e/apply-forces-and-newton-s-third-law 2026-05-01T13:40:34.883034315Z Apply: Forces and Newton's third law Apply your knowledge of forces and Newton's third law in this set of free, standards-aligned practice questions. Molly Sauder exercise