Question: Which of the following is a correct expression for kinetic energy of a rotating rigid body?

Options:

1. KE = 1/2 mv^2
2. KE = 1/2 Iω^2
3. KE = Iα
4. KE = 1/2 mω^2

Correct Answer: KE = 1/2 Iω^2

Solution:

The kinetic energy of a rotating rigid body is given by KE = 1/2 Iω^2, where I is the moment of inertia and ω is the angular velocity.