Hiya! I'm in an oddly good mood today, so this is going to be a...how do you say....hip blog post, unless someone makes me mad, which is likely. Today we are going to learn about work! No, not the kind your parents go to, 'cause then that would be kinda weird, wouldn't it? This is a scientific kind of work, which, to me, is a bit confusing, because when you grow up with one idea of work, which is, Daddy is sorry he couldn't come to the last game of the season. He has to work, it's kind of hard for someone to put a different type of definition in your head. Technically, though, in scientific terms, if he's at a meeting or typing on a computer, he isn't working. So, poor kid was lied to.
Isn't that heart-breaking? If my kid did that to me, which is impossible, because I don't have a kid, nor am I planning on having one, but if he did that to me, he could rule the world. Anyway, work is basically force multiplied by distance. So if a tiger picks up its baby it is
But if a tiger carries its kid all the way to a tree three miles away, then back again, then to the stream a mile away, is it doing work?
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Anabel helped me do this because she is awesome<-----That was Anabel. |
How is that possible, you ask? Simple. There was no force applied to the tiger cub. Force is a push or a pull. When the tiger carried its cub, the tiger didn't use a push or a pull. So if work is force multiplied by distance, and if the tiger didn't use force, then he didn't do any work. Same thing with pushing a wall. When you push on the wall as hard as you can for, say, ten, fifteen minutes, most people would say you're doing work. But you're not, because though you applied force, unlike out friend mother tiger, you did not move the wall anywhere, and you need that to do work.
That is a very good picture to describe work. You know, or you should know, that newtons measure how much force you use, and distance is measured in meters. But what are joules? Well, it's actually really simple. Joules, as shown above, are what measure work. So if a guy mows his lawn with fifteen newtons of force, and he covers one hundred meters, this would be the formula:
Now time for negative and positive work. Unfortunately, this isn't going to be as easy as poitive and negative buoyancy, where positive was floating, and negative was sinking. Say two boys are playing catch. The one whose throwing the ball is doing positive work, because he is applying force to the ball, and the ball is covering distance. When the second boy stops the ball, he is doing negative work, because though he applied force, it stopped the ball, not started it. It's kind of confusing, but you'll get there in time.
So, that's about it! Like every time, if you wanna know more, in a more 'positive' attitude, then go to my classmate's blogs! I know Logan's URL now, so you can go to hers! Ooh, and I'll add some other websites, and maybe a video as well. Thanks for reading, even if you were force! Peace out, ma home dawgs!
Good Job Feebs! As always your blog was perfect, maybe even a little too perfect! I love you feebs!
ReplyDeleteOh Fatima! I love it (:
ReplyDeleteGood job it was very informative and you had cool pictures.
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