Because Earth’s rotation is slowing down ... interference can be used to determine the angular velocity. From all four triangles, the full 3D rotation vector of the Earth can be reconstructed.

and with the rotor rotating relative to that frame at a constant rate of ω 2. The goal of the problem is to calculate the angular acceleration of the rotor. The analysis for this is provided below.

Probably a better name would be 'rotational mass'. Just like momentum (regular linear kind) is the product of mass and velocity, the angular momentum is the product of the rotational mass and the ...

Instead of mass, we refer to moment of inertia, which measures how spread out the mass is about the point of rotation. Instead of velocity we say, “angular velocity,” which measures how fast ...

Momentum is the impulse an object carries when it’s moving through space — it’s a product of an object’s mass and velocity. Angular momentum is basically momentum with a rotational motion ...