Dynamic simulation = > restitution

[Anonymous]

Hi!

I am learning Dynamic simulation = > restitution.

I use the tutorial by @JDMather 

https://www.youtube.com/watch?v=Rer-IjWzKAU&list=PLp5izJt_zvN08mpY4UcYrzJV2N6QOLAIR&index=6 

I have trouble in creating 2d contact

The assembly is attached 

Thank you.

[Anonymous]

Could you provide me with an example where arrows are in opposite direction?