Understanding Dampening Force

My raycast suspension works perfectly on 50-60fps. However any lower it starts showing weird behavior. I am quite aware of the reason. To fix this i found this formula on another post.

image_2025-05-05_205609079

Before i was using the formula without the second derivative part. However, the addition of that part fixed my problem, i cant seem to understand why it fixed it. Can anyone guide on why does this formula work? One more thing that i am using impulses rather than vector force.

link to that post: