https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:forces/x0e04e0cb682fb793:untitled-lesson-144newton-s-first-law-of-motion/v/newtons-first-law 2025-12-18T02:00:41.510401167Z Newton's first law If the forces acting on an object are balanced (the net force is zero), the object will not accelerate. It will remain at rest or moving with constant velocity. If the forces acting on object are unbalanced (the net force is not zero), the object will accelerate. Its speed and/or direction of motion will change. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/b3419448-c6b7-41eb-a34e-fe3cbbd247d4_1280_720_base.png Newton's first law If the forces acting on an object are balanced (the net force is zero), the object will not accelerate. It will remain at rest or moving with constant velocity. If the forces acting on object are unbalanced (the net force is not zero), the object will accelerate. Its speed and/or direction of motion will change. https://cdn.kastatic.org/ka-youtube-converted/Q0T2zjmvvA0.mp4/Q0T2zjmvvA0.mp4 366 Newton's first law https://www.khanacademy.org/science/grade-7-science-tx/xe25057200abc6bd6:motion/xe25057200abc6bd6:newton-s-first-law/e/understand-newton-s-first-law 2026-06-30T14:20:41.927190319Z Understand: Newton's first law Check your understanding of Newton's first law in this set of free, standards-aligned practice questions. Molly Sauder exercise https://www.khanacademy.org/science/grade-7-science-tx/xe25057200abc6bd6:motion/xe25057200abc6bd6:newton-s-first-law/e/apply-newton-s-first-law 2026-06-30T17:10:42.766349973Z Apply: Newton's first law Apply your understanding of Newton's first law in this set of free, standards-aligned practice questions. Molly Sauder exercise