Science Memes

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[–] Revan343@lemmy.ca 25 points 2 years ago (1 child)

Technically the gas pedal controls the change in acceleration, right?

Technically it controls the amount of air and/or fuel delivered to the engine (in a gas engine, the pedal directly controls airflow; in a diesel engine it directly controls fuel flow)

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[–] ulterno@programming.dev 0 points 2 years ago

A valve controller, yes

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[–] DrSteveBrule@mander.xyz 10 points 2 years ago* (7 children)

Acceleration in physics terms just means a change in velocity. Velocity is speed in a given direction. The steering wheel, gas pedal, and brake pedal all accelerate the vehicle.

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[–] Revan343@lemmy.ca 25 points 2 years ago (6 children)

Acceleration in physics terms just means a change in velocity. Velocity is speed in a given direction

They definitely know that, given that they know that change in acceleration is called jerk

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[–] billwashere@lemmy.world 10 points 2 years ago (5 children)

And I had no idea what the fourth derivative was called so I had to look it up. It’s called snap or jounce.

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[–] nBodyProblem@lemmy.world 7 points 2 years ago

And fifth/sixth derivatives are crackle and pop because some physicists thought it would be funny to have it be “snap crackle and pop”

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[–] 0ops@lemm.ee 3 points 2 years ago (3 children)

I remember when my calculus professor offhand mentioned these and jerk. He had a really dry sense of humor, so I didn't realize that he wasn't joking with us (the class) until like two semesters later.

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[–] ulterno@programming.dev 0 points 2 years ago (2 children)

So, you didn't realise that during the unit test?

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[–] 0ops@lemm.ee 2 points 2 years ago (1 child)

If I remember right, it wasn't on any test. Those tests were all problem solving, and none of the problems had derivatives deeper than acceleration. It was awhile ago though, I could be misremembering

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[–] ulterno@programming.dev 0 points 2 years ago

Well, it might just have been an out of syllabus thing considering I was not taught that in class and only learnt it while having fun somewhere.

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[–] mexicancartel@lemmy.dbzer0.com 5 points 2 years ago

Increasing speed -> acceleration Decreasing speed -> negative acceleration Changing direction -> Vector acceleration(change in velocity)

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[–] arcane@lemmy.world 4 points 2 years ago

No, if there is constant pressure on the accelerator, there is a constant acceleration on the car.

The jerk comes with the rate of change of pressure on the pedal (e.g. if you stomp on it)

That would make the driver the jerk 🤔