walf

Robotics Engineer

[walf @SirWalf]

@StarlingMage I'm surprised this is real.

[walf @SirWalf]

@1a1n1d1y Take a breather and actually work through the problem man. It's okay. Everyone makes mistakes. Once you do then feel free to come back and admit it and I'll say no harm no foul. Even people who make being an engineer their only personality trait make simple mistakes! It's okay!

[walf @SirWalf]

@1a1n1d1y I'm not saying you can't do it I'm saying that *you* did it incorrectly. Your math is wrong. You made a mistake.

Also, your question was looking for the max, which in this problem the max is not when launched at 45deg.

I can see why you can't hold a real job as an engineer.

[walf @SirWalf]

@1a1n1d1y There are two components to the velocity, I'll write them in scalar form: v = [v_x, v_y] in ft/s

Translational from the vehicle:
v1= [22, 0]

Tangential form the broom:
v2 = [47.1*cos45, 47.1*sin45] = [33.3, 33.3]

v_total = v1+v2 = [55.3, 33.3]

distance= 2*vx * vy / g = ?

[walf @SirWalf]

@1a1n1d1y The truck can't tilt upwards, its 22ft/s don't get directly added to the 47ft/s exit velocity at 45deg. These two velocities are vectors, you can't just add them as if they were scalars. Yet you did exactly that. This is literally a intro to physics level mistake.

[walf @SirWalf]

@1a1n1d1y Hahahaha lmfao bro is using google ai overview to do his physics for him and trusting it over an actual engineer and a real model like Claude Fable telling him he's wrong.

I make more $ as an engineer right now than you do.

[walf @SirWalf]

@1a1n1d1y In the future be a little less arrogant and condescending and maybe stick to CAD like the good little design engineer you are.

Good luck with your shitty browser CAD app I'm sure it's gonna make it.

[walf @SirWalf]

@1a1n1d1y Lmfao dude the AI even predicted your mistake in the Caveats section while agreeing with me. How embarrassing.

[walf @SirWalf]

@1a1n1d1y You posted a malformed problem, got the wrong answer in multiple ways, showed us the exact line where you fucked it up, and then bragged about how good of an engineer you were. What exactly should I learn from you?

[walf @SirWalf]

@1a1n1d1y Yeah buddy your BS in ME from a decade ago is really impressive. I have one as well and then some. Here's the actual answer to the question. As well as the actual answer with correct math if you use your incorrect assumption of 45deg launch angle being maximum.

[walf @SirWalf]

@1a1n1d1y vx = 47.1*cos45 + 22 = 55.3 ft/s
vy = 47.1*sin45 = 33.3 ft/s
t = 2 * 33.3 / 32.2 = 2.07s
d = 55.3 * 2.07 = 114 ft

So the "max" range assuming no air resistance and launching at 45deg is 114 ft

Also doing all of this in imperial units is miserable

[walf @SirWalf]

@1a1n1d1y Wait lmfao you didn't even do the math right for your own model. You added the 22ft/s translational speed to the 47.1ft/s of the rotary tip speed except you're launching at 45deg so they're different vectors and you're incorrectly adding them together like scalars.

[walf @SirWalf]

@1a1n1d1y In the problem you specify weight. The only time where weight would ever matter is if you are also considering air resistance.

When you consider air resistance, 45deg is not the optimal launch angle, and the maximum distance is significantly lower.

[walf @SirWalf]

@1a1n1d1y >"guys look at me I'm a professional engineer"
>Intro to physics problem
>Gets it wrong.

[walf @SirWalf]

@johnennis I mean a large long context window causes degradation in performance so I'd bet this is an attempt to signal that to people who are unfamiliar with how AI works but does so in a weird anthropomorphize way rather than being direct.

A fresh instance usually performs so much better

[walf @SirWalf]

@high_everett @splitbycomma And all the mathematicians would throw their hands up and rejoice

[walf @SirWalf]

@splitbycomma Hey! Cancer researcher here? Why are we celebrating the cure for cancer?

Do people not realize this puts us researchers out of a job?

How do people not realize this? Wow!

[walf @SirWalf]

@_kei18 great, thank you!

[walf @SirWalf]

@aetherforge0 The cushions even look like the bayer filter photo on wikipedia https://t.co/qiagHfcK0O