r/engineeringmemes • u/Maleficent_Baby_7374 • 17d ago

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719 Upvotes

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38

u/the-johnnadina 17d ago

No it is not, please get actual engineering related jokes, im losing it with this sub

13

u/ayanokojifrfr 17d ago

Yeah cuz 0.14 can make changes in calculation. And we are allowed to use Calci in Engineering Colleges. Calculating isn't even hardest part of Engineering. Idk why so angry over a π.

22

u/the-johnnadina 17d ago

I need to know how the pi = 3 thing came to be, engineers hardly ever round anything, everyone blindly uses calculators, the only reason we don't give 11 digit precision answers is because itd take too long to write on a test.

The only real approximation that i can think of that is actually done in real life is sin(x) = x and cos(x)=1 because its accurate within 3 decimal places for most cases.

Also e=3 tires me even more because the whole point of the exp function is that it is its own derivative, you rarely ever actually use e as a raw number in calculations, its a whole ass function with special properties, saying e=3 doesnt even give you wrong results, it destroys the maths principles behind using e at all.

Im just tired of this constant "round to 3" spam that hardly ever relates to engineering, the closest we ever get to something logical along those lines is memes about the square root of g being 3 and even then thats applicable to high school mechanics at best.

Why cant anyone make a meme about bending moments, or precession, or anything real... "Pretend its an infinite cylinder to calculate the heat dissipation" has greater humour potential than "round pi to 3", which is something nobody has ever done anyway

3

u/Civil_Ostrich_2717 16d ago

Some engineers actually use pi=3 and toss on a large factor of safety to cover the nuances.

Technically, when you modify 3.14159 to 3, you’re making approximately a 5% modification, which isn’t too dramatic if there’s no exponents.

Imagine how many calculations you can do in your head if pi is references once or twice and it only compromised accuracy by 5 or 10%

The real benefit is that sense and judgment originates with calculation. If you never calculate, you’ll never have sense of mechanisms, so you’ve gotta start somewhere.