3d dynamics rotation/inertial formula question

[xzibition8612]

Homework Statement

I just saw the equation R'=RΩ (where ' is dot, or the derivative) in my notes (unorganized obviously), and can't remember what it stands for (rotation matrices?).
Can somebody please tell me what this equations means thanks. I know R is some position vector and Ω is the angular velocity, but I don't get what this equation is saying. Thanks.

Homework Equations

The Attempt at a Solution

 

[RTW69]

For Circular motion, the tangential velocity (m/s) = radius of circle (m) x angular velocity (radians/s)