Uniform Circular Motion Model- Energy

Section 7.4

What is rotational kinetic energy (particle)?

Energy of an object associated with its rotational motion

What is rotational kinetic energy (extended object)?

For a rigid object, each particle has the same angular velocity

The tangential speeds of these particles will differ based on their radii

Equals the sum of the rotational kinetic energies for its constituent particles

What is the moment of inertia?

A measure of the rotational inertia of an object

What is the symbol and SI unit of moment of inertia?

𝐼
kilogram- meter squared

Although kinetic energy always has the same physical meaning, we distinguish transitional kinetic energy associated with motion through space and a type associated with rotation. What is the name of this second type?

Rotational kinetic energy

Given a rod length 1.00 m and mass 0.500 kg, which case does the rod have a greater moment of inertia

Rod rotated at its end