00:01
Okay, so let's say we're drawing a motion diagram for the car trip graph in figure 2 .15a.
00:07
So first let's, first let's get my mouse, and then let's draw the graph for 215a.
00:15
So that's a velocity time graph.
00:16
So it looks like, i'll draw it over here.
00:19
It looks like this.
00:21
And so that's velocity, time, and it goes like that, and then it goes like that, and then it goes like that, something like that.
00:30
Then there's three distinct parts.
00:36
So let's look at what's happening here.
00:38
So this thing, this part right here, your velocity starts at zero.
00:42
And then it speeds up, right? so this thing is getting faster here.
00:46
And then here the slope is zero.
00:48
You have some constant velocity.
00:49
So it's going a constant velocity here.
00:53
And then here your velocity starts at some big value, and it's going back down to zero.
00:57
Right? so this is getting slower.
01:01
Slower.
01:02
All right.
01:03
So knowing that, let's go draw a motion map.
01:05
Motion map is little vectors that show the speed of the object at any point.
01:10
So it starts at zero, right? i'll start over here.
01:13
And then it gets faster...