Reactor

To use the reactor option : bring up the reactor toolbar (right click on edge of main toolbar) or click on the hammer and choose reactor

On the reactor tool bar there a many option to play with the first is using the rigid body collection (building blocks)

I have drawn 2 rectangles and 2 spheres the aim is to have the spheres fall and run down the planks, the larger sphere will react differently to the smaller sphere.

Select the rigid body collection and on the command toolbar add the objects that  will react together.

On the property editor select an object and add different properties to it.

I added unyeilding to the rectangles this stops them from moving when reacting with the objects.  To the spheres I added bounding sphere, the larger ball had a mass of 5 and the smaller a mass of 15, this created more of a reaction within the larger sphere.

The animation can be previewed by clicking on the last but one button (preview animation)

 

 

 

 

 

As you can see the objects reacted differently to the surroundings.