Why the speed is settled for the two bodies?. Isnt it enough that only one has twice the speed? Relative impact velocity will be the same

Are these two parts mated in assembly prior to simulation? If so, what mates did you use?

I apologize for the wind. I will be purchasing a wind sock in the near future! Enjoy.

Sorry I am new to this so the link in the video doesn't work, but i left a link in the description!