Making the world go boom

Hi all!

I’m trying to follow CG Geek’s’s tutorial on how to blow up the earth.
I’ve gotten to the point where I already added collision, physics, etc to the shattered earth and I just start throwing stuff at it, but my results are very far from what he is getting. My pieces of planet just hang around kind of orbiting in a spiral…

It shouldn’t be a scale issue as I’m using the model he uploaded, so can you guys identify what I’m doing wrong?

Attached my video describing the issue and the tutorial.