
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.
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 …
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.
Center of mass (video) | 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 …
Rotational inertia (article) | Khan Academy
However, for many common geometric shapes it is possible to find tables of equations for the rotational inertia in textbooks or other sources. These typically give the moment of inertia for a …
Angular momentum (video) | Khan Academy
The equations in the video are correct. Where are you seeing the equation L = m * w? The closest I have seen is L = I * w where the I is moment of inertia which is I = m * r^2. The distance of …
Systems and Newton's third law (article) | Khan Academy
We can use lines of symmetry to help determine where a system's center of mass is located. For example, a line of symmetry for the bucket of balls is modeled below:
Rotational kinetic energy (video) | Khan Academy
We've got a formula for translational kinetic energy, the energy something has due to the fact that the center of mass of that object is moving and we have a formula that takes into account the …
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 …
Force diagrams and rolling (article) | Khan Academy
The gravitational force can be modeled as acting at the system’s center of mass. Since the wheel-sprocket system is symmetrical, the center of mass is at the axis of rotation.