r/theydidthemath • u/BedirhanGz • 1d ago

[Request] What's his speed?

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86

u/noonius123 1d ago edited 1d ago

I would say this is about 1 km distance in 14 s. That's 250 km/h, plus/minus 50 km/h.

Sanity check: have you ever seen those WRC onboard rally videos where they zoom on narrow roads in Finnish or Estonian forests? They go >150 km/h on straights. This looks even faster.

27

u/Large_thinking_organ 1d ago

The guy crosses a bridge looking thing in about .3 seconds, which appears to be about 2 meters. That's 6 2/3 m/s, or about 22.80 km/h. Usain Bolt's record is an average speed of 44.72 and an average sprint is 14.58 for an average untrained male at their peak

17

u/Large_thinking_organ 1d ago

Examening the video closely, the speed seems to go up and down periodically, with the bridge being a slower part. I'd estimate about half the time it's at bridge speed and half is a little under twice that, which puts it at around 30 km/h average

7

u/jwhit88 1d ago

Judging by the width of the separation between trees and the hands alternating (presumably the feet as well,) that would be terrifying.