AP Physics C: Mechanics / Unit 6: Energy and Momentum of Rotating Systems
6.1 Rotational Kinetic Energy
Notes
$$K_{rot}=\frac{1}{2}I\omega^2$$
Practice
$I=2$ kg·m², $\omega=3$ rad/s. $K_{rot}=$
$\displaystyle \frac{1}{2}(2)(9)$.
Doubling $\omega$ makes rotational KE:
Squared.
A spinning object at rest in place (not moving across the floor) has:
It's spinning.
Ready for more? Take the Unit 6 test.