Trying to get ball to explode when it hits wall or slows to 0 from FPS default projec

As stated in the title, I’ve been trying to get ball to explode when it hits wall or slows to 0 from FPS default project. You would think it would be easy but I can’t get it to work. Here is one out of the MANY things that I have tried but it still does nothing. Please give guidance. (this image doesn’t show the location, but I’ve tried adding that too …

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