A merry-go-round disk with a rotational inertia of Id I
d
about its center spins around its center axle with an initial angular velocity of ω0
ω
0
. A child is standing near the edge of the merry-go-round, as shown in Figure 1. The child’s rotational inertia about the center of the disk when near the edge is I0
I
0
. As the merry-go-round spins, the child moves closer to the center, as shown in Figure 2, until the disk rotates with an angular velocity of ω1
ω
1
. Which of the following equations could a student use to determine the rotational inertia Is
I
s
of the child-merry-go-round system about the center axle immediately after the child has moved to the location shown in Figure 2? Justify your selection