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  1. Systems and center of mass (article) | Khan Academy

    You have the positions of each point, multiplied by the mass of that point, and all of that divided by the sum of the masses to get the position of the Center of Mass.

  2. Equation for center of mass (video) | Khan Academy

    The center of mass can be calculated by taking the masses you are trying to find the center of mass between and multiplying them by their positions. Then, you add these together and divide that by the …

  3. Center of mass and two-dimensional collisions review

    Review the key concepts, equations, and skills for the center of mass and two-dimensional collisions, including how to understand center of mass motion.

  4. Center of mass (video) | Centre of mass | Khan Academy

    Learn about the concept of center of mass and its real-world applications. Understand how objects with uniform density have their center of mass at the geometric center, and how this changes with non …

  5. Rotational inertia (video) | Khan Academy

    Well, the moment of inertia depends on axis, so if you were to consider inertia about the hinge, then it would be more than the inertia about the center of mass. However, if you actually want to know the …

  6. Newton’s law of universal gravitation (article) | Khan Academy

    Gravity causes attraction between all objects. Every mass attracts every other mass. That means you are gravitationally attracted to your friend, your pet, and even your pizza. The variable r ‍ is the …

  7. Linear momentum | AP®︎/College Physics 1 - Khan Academy

    Learn how to calculate the position of a system's center of mass. Explore how the motion of a system's center of mass is related to conservation of momentum, and practice predicting motion using center …

  8. Conical pendulum example (video) | Khan Academy

    Practice solving for the tension and speed of a mass swinging at an angle in a horizontal circle.

  9. Angular momentum (video) | Khan Academy

    The mass of the rod is 1 kg, and its center of mass is the exact center of the plank. The plank hits a stationary object 0.5 meters away from the center of mass.

  10. Physics archive | Science | Khan Academy

    The physics archive contains legacy physics content, and is not being updated with new content. For our most up-to-date, mastery-enabled courses, check out High School Physics, AP Physics 1, and AP …