Free body diagrams in Kangaroo


I would like to use Kangaroo to create free-body diagrams of some simple foot models in dynamics. I’ve already made something for static equilibrium without using Kangaroo. But I found this video made by @DanielPiker, and I believe this is what I need. My problem in this phase is not related to the code but to the theory behind the video. I mention I would like to use graphic analysis of forces! I didn’t find any other resource to understand the theory because probably I didn’t search for it in the proper place so any help will be appreciated! Here is what I’ve done till now. Thank you in advance! Sincerely,