So... speed has this friend named Velocity. Speed and velocity are very different, much like me and my friend Fatima! (I'm sorry feebs, I had to do that!) Speed is how fast you are moving. Here's an example.
Let's say you're on a long trip to Alabama. When the accelerator on your car say 50 mph, that is how fast you are going, thus making it your speed!
Now, before we move onto velocity, another thing you should know about speed is that there are three types:
- Instantaneous: The speed of which you are going at a certain time. So, if I were to ask you "WHAT SPEED WERE GOING ON MAY 17TH, 2004 AT 5:36 PM?!", you probably wouldn't know, *but*, if you did, it would be your instantaneous speed :)
- Constant: Speed that never changes. The only real example I can think of that is the moon rotating on it's axis. It never gets out of breath
- Average: When I am running a mile, there is always a big hill that gets me. So I slow down. Basically, average speed is speed that increases and decreases.
Now for velocity!!!!! Velocity is the speed and direction you are going. Let's say you were in the same car situation as above, but this time you are going 50 mph, WEST. That would be your velocity. Changes in velocity can add changes in the speed, too! Pretty easy, right?
Okay, so this is where it gets all mathematical. The formula for speed is (speed= distance/time). I know, it looks confusing, but let me explain. So, again, speed is distance divided by time. Let's say Jimmy can run 60 km in 3 seconds. So, we divide 60 by 3 to show how many fast he is going. So, Bob is going 20 kph.
Well, I think that's it and I hope there wasn't anything I forgot! Hope you guys have an awesome week! Oh yeah, if you wanna learn more, I'll post some links below! :D SuperSaraSuperBye!
| and of course... my big smiley |
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