Zorba the Hutt (zorbathut) wrote,
Zorba the Hutt
zorbathut

  • Mood:

on work

So there's this concept in physics I never quite got. "Work." (No jokes here - well, for now.)

Every place I found that explained it did so *really badly*. It's a force over distance! So, say, carrying a plate? No, because the force isn't in the right direction. Oh. Okay. So, what about a weightlifter? Well, that counts as work. It takes a force to lift objects, and you're lifting it towards you. But, er, doesn't it take a force to move the plate forward? NO! That's not work! So, okay, what about a box? Pushing a box. Yes, that's work! Pushing a box at a constant speed is work! Wait, no, it's not. So, is pushing something more slowly less work, or the same amount of work? Or no work?

Finally, after muddling through a badly-explained chapter and a half, they sort of say in passing "Therefore, work is the change in kinetic energy."

OH.

Why didn't you say so BEFORE?
Subscribe

  • (no subject)

    For a while I've been posting entries from my dev journal, Mandible Games, in here as well. I made some setting changes to my blog and that ended up…

  • Roguelikes: The Misnamed Genre

    Recently, I’ve been playing a game called Dungeon Crawl: Stone Soup. You should play it. It’s good. DCSS is a game about searching a…

  • The Origin of a New Game

    I’ve got another megapost percolating, but I saw something from Warren Ellis and had to quote it: Sometimes it works like this. You can’t…

  • Post a new comment

    Error

    default userpic

    Your IP address will be recorded 

    When you submit the form an invisible reCAPTCHA check will be performed.
    You must follow the Privacy Policy and Google Terms of use.
  • 7 comments