Rotational kinetic energy (AQA A-Level Physics): Flashcards

$E_k = \frac{1}{2}I\omega^2$

Mass ($m$)

Linear velocity ($v$)

$v = r\omega$

Device designed to store rotational kinetic energy

Proportional to $\omega^2$ (square of angular velocity)

Position mass far from axis of rotation

Linear KE + rotational KE

$v = r\omega$ where $v$ is linear, $\omega$ is angular velocity

$I = \frac{1}{2}mr^2$