Point Gravity with reduced momentum

Hello! I’ve followed a tutorial (UE4 tutorial: point gravity actor - YouTube) on implementing point gravity but I’m having trouble implementing the additional things I want.

  1. I would like to reduce the momentum of the objects when they hit the center but not to the point where all particles would just stop moving. I’m sure I need to change some of the properties in the blueprint but I’m not quite sure I need to change.
  2. After a swipe, I would like for a random number of objects to fall and stop following the momentum.

Thank you in advance!