News for hackers. Stuff that matters.

A comment on How Many Equations of Motion Describe a Moving Human?. Parent comment

Re:How Many Equations of Motion Describe a Moving Human? by causi on Tuesday August 30, 2022 @12:53PM (#32652525)
Not sure that holds up to strict scrutiny. It's a fine hypothesis for the armpit but makes no sense with the groin. There the hair is heaviest on skin that touches nothing else and almost indistinguishable from background on the actual sliding surfaces. Same for butt crack.
[ Parent | on HN ]
Re:How Many Equations of Motion Describe a Moving Human? by dvh on Tuesday August 30, 2022 @01:58PM (#32653176)
Hair act as mechanical lubricant.
[ Parent | on HN ]
Re:How Many Equations of Motion Describe a Moving Human? by causi on Tuesday August 30, 2022 @02:21PM (#32653405)
Exactly, so why isn't there more hair on places that need mechanical lubrication other than the armpits?
[ Parent | on HN ]
Re:How Many Equations of Motion Describe a Moving Human? by dvh on Tuesday August 30, 2022 @05:47PM (#32655574)
What places?
[ Parent | on HN ]
Re:How Many Equations of Motion Describe a Moving Human? by causi on Wednesday August 31, 2022 @07:39AM (#32660883)
The creases between the tops of the thighs and the abdomen, the crease between the butt cheeks.
[ Parent | on HN ]
Re:How Many Equations of Motion Describe a Moving Human? by dvh on Wednesday August 31, 2022 @05:44PM (#32668765)
The angle would not be right, you want hair growing slightly off an roll parallel where it should lubricate. Armpit is bit of problem because it normally goes 180 deg so they cannot choose preferential direction. There the optimum is probably more radial then linear.
[ Parent | on HN ]