Understanding Angular Velocity in Rotating Frames
Explore the concept of angular velocity in rotating frames with examples like a car accelerating and tides. Learn about Euler's theorem, tiny rotations, and the proof of two angular momentum theorems in the context of reference frames in physics.
Understanding Angular Velocity in Rotating Frames
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Presentation Transcript
Physics 321 Hour 24 Accelerating Reference Frames I
Glass of water in a car • Tides Examples
Euler’s Theorem • Any tiny rotation can be considered as a rotation about a fixed axis. • (Complex rotations can be taken to be a series of infinitesimal rotations.) • Tiny rotations commute. • (Larger rotations do not commute.) Two Angular Momentum Theorems
Any unit vector can be written as In general where S0 is the lab (inertial) frame and S’ is a frame rotating with angular velocity . Proof
Angular velocity vector (r.h.r.) • Let be a unit vector fixed in a body • In particular • In general Angular Velocity