Newton's third law | Physics | Khan Academy

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/science/h... 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. Sections: 00:00 - Newton's third law with examples 02:42 - Newton's third law and acceleration 04:11 - Why don't equal and opposite forces cancel out? 05:36 - What is action and reaction? 07:00 - Applying Newton's third law ------------------ Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate here: https://www.khanacademy.org/donate?ut... Volunteer here: https://www.khanacademy.org/contribut...