Moment of inertia So KE=-Io where I Notice that the moment of inertia /depends on the distribution of mass in the system The further the mass is from the rotation axis, the bigger the moment of inertia For a given object, the moment of inertia will depend on where we choose the rotation axis(unlike the center of mass We will see that in rotational dynamics, the moment of inertia appears in the same way that mass m does when we study linear dynamics Physics 121: Lecture 18, Pg 4Physics 121: Lecture 18, Pg 4 Moment of Inertia Notice that the moment of inertia I depends on the distribution of mass in the system. The further the mass is from the rotation axis, the bigger the moment of inertia. For a given object, the moment of inertia will depend on where we choose the rotation axis (unlike the center of mass). We will see that in rotational dynamics, the moment of inertia I appears in the same way that mass m does when we study linear dynamics ! 2 I 2 1 KE =  I = m r i i i 2 So where