Torqued off

b1-66er: https://youtube.com/shorts/6wHSkWTqzVY?feature=share

b1-67er: That spinning bullet video is surprising.  I wouldn't guess you could stop the bullet without killing the angular momentum.

D4rw1n: I can't figure out what's going on with the physics there either

66: Here's my take on the bullet...

... Remembering that, while YES, I graduated bottom of my class "with the lowest GPA in the history of the engineering school,"¹ I also can still give you things like equations for the Ideal Gas Law without using Google².

Momentum is conserved. 

That's some law of Newton I can't tell you and I always just ask my brother for the number...

It can be translated. 

So your car can go from driving forward to flipping end over end.

But it's all still there...

Any kid with Hot Wheels and two leisure minutes can tell you that ...

I think of a bullet as having 2 degrees of motion: forward and (a super technical term, hinted at by my brother) "spinny" [the rifling is to keep the bullet flying straight and not tumbling end-over-end]...

You blast a shot into a slush patch, that takes care of the forward momentum, but good...

...said projectile is hot and still spinny...

... The projectile has no reason to lose those properties...

That's my official Applied Mathematics³ analysis...

You both owe me a donut...

{And don't you DARE frown at me for billing you a donut, when you both can [and should] get them for free.}

67: I think that analysis is basically right.  I suspect the water at the front of the bullet probably turns to steam instantly and makes a sort of air bearing so the friction becomes very very low at the front of the bullet.

66: Okay, so now I owe my brother a donut.

¹Their words.

²And I'll bet none of my other goddamn higher GPAd classmates can. So what if I took Thermo 7 times. Like, what, that makes me LESS likely to remember it?

³Not an engineering discipline, instead it's an "applied science," the other is Engineering Physics.