00:03
All right.
00:04
Looks like you had a lab that you were working on where you were dropping a ball and seeing how long it took for it to hit the ground, i believe, is what it looks like.
00:16
I don't have much information about what materials you used.
00:22
Just the conclusion questions here.
00:25
So i'm making the assumption that you drop the ball and it was to hit a pressure pad.
00:31
And i assume that you had a photo gate that was up at the top here when you dropped it, it started the timer, and then the timer stopped when it hit the ground and hit that pad.
00:44
And then you use this equation to find g.
00:47
So the height is y and the time that it took was recorded by a photo gate, i believe.
00:55
So one half g times the time squared will be the height.
00:58
So to find g, you probably were using 2y divided by t squared.
01:06
It is what i'm assuming you did.
01:10
Without any more information from your setup, i'm not real certain on that.
01:15
So it says discuss the sources of error in the experiment.
01:19
Were there sources of random error? what were they? what about systemic or systematic error? all right.
01:25
So random error would be things that just based on how you dropped it.
01:32
For example, if you didn't drop it straight down, like maybe your hand moved right as you dropped it, it would have a velocity to it, maybe a velocity to the side, a slight amount, maybe not even that measurable to you.
01:45
Or you may have tossed it down.
01:47
You may have accidentally given it a little bit of push downwards or picked it up as you dropped it.
01:54
So there would be this outside force.
01:57
That could be a random error.
01:59
That's one that just you can't really do.
02:02
If you're the person that's doing it or the friend, that would be a human random error that you can't necessarily control because we can't be exact.
02:13
But if you had some device that would always open and drop the ball, that would probably eliminate that random error.
02:22
So that's the only.
02:24
Random air i could think of on dropping.
02:27
Maybe, i don't know, the air conditioner turned on in the room and caused a little bit more of a push, force of wind resistance.
02:37
That would be so little that it would really not even matter, but that could happen.
02:42
What kind of systematic error could there be? well, system errors would be whatever timing device you used, if it was off or if the photo gate wasn't working correctly or the touch pad didn't work or you used a ruler that wasn't giving you the right numbers or you didn't know how to use the ruler correctly to measure the height or you didn't know how to read the timer those would be all kinds of things that would be a systematic here that are always going to happen because you you weren't using the equipment correctly or the equipment was malfunctioning in the same way the whole time.
03:26
And then that could be readjusted then.
03:29
Random air can't be controlled.
03:31
It's just something that happens.
03:33
Like dropping the ball and if you're the one that's holding it or your friend is holding it, that human error of how we let go of each time is going to be a difference...