00:01
All right, so we have a position versus time graph.
00:03
It looks kind of like this.
00:06
Oh, let me need to scroll over.
00:09
Looks kind of like this.
00:11
Maybe this last slope should be a little bit more extreme.
00:15
But we're told this time interval is two seconds.
00:18
The time interval of the next change is at three seconds.
00:23
And then the next change occurs at five seconds.
00:29
Of course, this is zero seconds.
00:30
And then lastly, our position is at this point it's 20 and at this point it's 40.
00:39
So those are all the essential markings that we need.
00:41
And part a asks, what is the velocity of the object at one second? so the velocity is going to be the slope of this first line.
00:50
And so it's going to be 20 meters in two seconds...