Conservation of linear momentum | AP Physics | Khan Academy
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Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/science/ap-college-physics-1 Linear momentum is conserved in all interactions. If the net external force on the selected system is zero, the total momentum of the system is constant. If the net external force on the selected system is nonzero, momentum is transferred between th
