I like to skateboard fairly regularly and am also an avid watcher of the sport. Earlier I was watching this video where a skateboarder tears his MCL on a landing down an enormous drop. However, after he recovers, he is able to land the mind-boggling ollie down a 25 stair.
This got me thinking about the forces at play during skating, in particular how forward momentum affects the impact felt by the body when landing. I personally know that when you have speed going stairs vs. just enough to clear it, the impact seems to be mitigated substantially.
What are the mechanisms at play here? Is it simply that because the force is not applied completely vertical that it feels as if less force is being absorbed?