Hi this is Mr. Doherty I am talking about motion maps, mainly for people that weren't in class while I went over, and we talked about how to do motion maps let's start with a scenario, I've got this car here. And here is our motion detector. Okay, motion detector here in our car is sitting right there. So the first thing that we want to do in this scenario is understand that the motion detector is what we're going to call position is equal to zero that's. The first thing that we need to do so.
Position is equal to zero there. Then we got our car let's just say for this example, let's say, our car moves this way until about there at a constant rate, and then it stops and that's it. So it starts, and then it stops for a little in the time interval is ended.
So we can represent this differently other than drawing this motion up here, that's called using a motion map and motion map looks something like this. Well, there's little in six here, didn't matter how many. And so the first thing. We need to do is the far left line I'm going to put 0 meters there, ok, or 0 anything in a measurement unit, I guess, I haven't specified. What the unit-linked measurements our position measurements. So we're going to say, 0 and indicate any position measurements there then I'm going to notice if each one of these are six now I could make them anything a comedian 5 meters, 10 meters, whatever, but it's its problem. It doesn't specify I'm just going to leave a blank.
So the first thing we need to do to. Figure out our motion map, the motion much base. Basically tells us where the object is adding every given time interval. So typically on a motion map I have to do this delta T is equal to some number. Ok. And so we could be looking every second.
Well, if I'm looking every second, if I write one second there, and I'm going to put a dot down every second where it is so let's say, it starts at zero seconds. Let's say, it starts not at zero because it's, not a zero it's. Not right on top of the motor say it. Starts right here, so I'm going to put that they're right underneath that I'm going to write t, start or t is equal to 0 just to indicate that that's our zero time if so then every second I'm going to put a dot, well, since we don't really specify, can do however, many dots I want so let's just say it went for three seconds. So one, two three and as I'm going my position is changing. So this line right here.
This black line represents the position. These dots are representing where that object is at a. Given position, okay in every second, so it's, not just jumping from one spot to the other it's moving at a constant rate. So to represent the ranked or the velocity that it's moving I use this arrow right here and there's another way to do this I said, it was a steady rate. And so these guys should all be equal tick, tick, tick, equalization marks show me that those guys are moving at a constant rate. Okay?
Well. Now the car has moved at a constant rate, and suddenly it stopped for a few seconds. So at this. Point right here, it's not moving. So after one more second, where is it going to be well? Right there at that same position? So I'm just going to start stacking them on top of each other I can keep going until, however, long, it takes a couple key things about that would be the motion map for this example, a couple key things first off velocity is represented by arrows and dots represent the position at a given clock reading so position at clock, reading all right I do hope that this helps your.
Understanding and emotion maps, please use this for the rest of lab p point to motion detectors.