If you comb your hair, you may have found yourself wondering how fast (in metres per second) your elbow moves as you do so. In which case, help is at hand – in the form of a recent paper published in the American Institute of Physics (AIP) Conference Proceedings.
A research team from Kolej Poly-Tech MARA in Kuala Lumpur, found, by experiment, that it tends to be around 0.4 – 0.6 m/s.
See: Peak velocity of elbow joint during hair combing activity for normal subject in AIP Conference Proceedings 1940, 020113 (2018)