Never thought I'd use: "Wetness per second," as a measuring unit.

That was the longest "running is better" I've ever heard

There's a lot of complications to this problem. You assume that rain falls directly down, but most rain is accompanied by wind. Now, rain hitting you side is a function of time, distance, and speed (if you exactly match the speed of the wind, no rain will hit you from the side). Turns out, the best strategy into the wind is maximize speed, and with the wind you want to be a bit faster than the wind.

Lifehack:

many scientists believe using an umbrella might actually help

I've honestly wondered about this my whole life, but couldn't figure out the maths behind it. Moving upward into the rain is a great visual.

I was fearing he would say last minute: "so the best solution is to use an umbrella" after all the math he explained XD

Looks like youtube recommendation brought us all together again

This is amazing, I’ve had this exact theory for ages now, but always felt like I was making stuff up when I was telling other people. Until today. Seeing it actually be proven true feels so validating.

99.9% scientists recommend using a umbrella

"9 out of 10 scientists recommend this umbrella"

Reality math is always cool, but you should consider adding the angle of the raindrops to your equation. They almost never fall straight down. Just a slight wind from different angles could change the equation a lot.

Every time I see this in my recommended I watch it again because I keep forgetting

Let's appreciate those who invented umbrellas otherwise this could be the hardest physics word problem

Update: we actually just can’t go out anymore

The easiest way to think about it is with extremes. If you travel at 0km/h, you will be continually rained up and get soaked. If you travel at infinity km/h you will collect all the rain drops between you and your destination, but none from above.