How to add different Gravity velocity for different objects? I am trying to make an animation on Cycles render and this is what I have on my scene:

I have a ball that rolls from a high platform until it goes down and hits 11 dominos and make them fall, I want the dominos to have a higher value of gravity than the ball so they can fall on the floor a little faster than they currently do, how can I do this?

I'm using Physics, Both the dominos and the ball are active "rigid body objects". I even tried to increase the gravity value on the "scene" control panel > "rigid body field weights" which it does increase the speed of gravity and makes the dominos fall faster (what I want) but it also changes the gravity of the ball and makes the ball roll too fast and looks unnatural, not what I want.
I've not used Cycles but the "Damping" setting in the physics properties (see pic) will slow down a particular object where it's used and leave the others alone.   The cube has damping applied (bottom right in the settings) and the cylinder doesn't.  You can see that they're falling at different rates.

The view is from underneath the grid -