00:01
All right, we've got an automobile on a straight road, 40 kilometers per hour.
00:16
Oh, no, no, no, no.
00:17
It's 40 kilometers at 30 kilometers per hour.
00:26
It then continues, another 40 kilometers at 60 kilometers per hour.
00:39
The average velocity of the car.
00:43
Okay.
00:43
Okay, so, well, the time is going to be 40 divided by 30 kilometers per hour.
00:58
So that would be 1 .33 hours.
01:03
This one, the time would be 40 kilometers divided by 60 kilometers per hour, 0 .667.
01:12
We add the two times together and we get two.
01:16
This plus this is going to give us two hours.
01:22
So 80 kilometers in two hours would be 40.
01:32
Oh my goodness.
01:36
Oh, no, no, no.
01:37
40 kilometers per hour.
01:50
I need to graph x versus t.
01:55
So let's try graphing it on desmos this time.
02:05
Last time i graphed it on a spreadsheet.
02:13
So in desmos, the distance equals 30 times t.
02:28
Okay.
02:30
So here we have it.
02:32
30 for a certain amount of time.
02:39
Okay.
02:40
Now, i want to go for two hours and 80 kilometers...