Answer
$U_{g}$= -.004312 Joules
Work Step by Step
$U_{g}$= mgh
The bottom of the bowl is now at a negative height.
h=r=-.22m---$U_{g}$= .002kg$\times$9.8m/$s^{2}$$\times$-.22 meters
$U_{g}$= -.004312 Joules
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