1
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Number two, well number two 

2
00:00:02,327 --> 00:00:04,078
while still following number one. 

3
00:00:04,078 --> 00:00:06,262
But explain how the graph shows 

4
00:00:06,262 --> 00:00:08,141
that at first Samone sped up,

5
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and later slowed down,

6
00:00:09,609 --> 00:00:10,734
and the sped up,

7
00:00:10,734 --> 00:00:12,320
as she went away from the ground. 

8
00:00:12,320 --> 00:00:14,250
So, you guys were talking about speeds before

9
00:00:14,250 --> 00:00:16,172
but how does the graph

10
00:00:16,172 --> 00:00:17,609
show you speeds?

11
00:00:17,609 --> 00:00:19,234
Remember rule number one. 

12
00:00:19,234 --> 00:00:21,484
How does the graph show you speeds

13
00:00:21,484 --> 00:00:23,765
Remembering rule number one, Jeanna?

14
00:00:25,655 --> 00:00:29,795
[If you're covering more distance in a certain amount of time?]

15
00:00:29,795 --> 00:00:32,545
Okay. And if we pretend

16
00:00:32,545 --> 00:00:33,828
we're doing frame by frame

17
00:00:33,828 --> 00:00:37,078
what is true about that amount of time?

18
00:00:37,078 --> 00:00:39,670
[You're covering more distance?]

19
00:00:39,670 --> 00:00:40,920
Well, the time though. 

20
00:00:40,920 --> 00:00:43,420
Will the time be getting larger?

21
00:00:43,420 --> 00:00:46,311
[Same time] Okay, same time. And the is actually really important. 

22
00:00:46,311 --> 00:00:47,953
Because if your going to compare distances

23
00:00:49,453 --> 00:00:50,795
at intervals of time

24
00:00:50,795 --> 00:00:52,609
in order to really compare them, 

25
00:00:54,180 --> 00:00:55,984
do the distances have to be the same?

26
00:00:55,984 --> 00:00:58,109
Or can they be different? I'm sorry do the times

27
00:00:58,109 --> 00:01:00,875
intervals have to be the same or different? [Same]

28
00:01:00,875 --> 00:01:02,670
The same if you're going to compare them. 

29
00:01:02,670 --> 00:01:04,108
If you want to compare them on common ground,

30
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well then you need that common ground. 

31
00:01:05,343 --> 00:01:06,640
And that is why I like this

32
00:01:06,640 --> 00:01:08,500
frame by frame thing. And that is actually why

33
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we decided to do this.

34
00:01:09,578 --> 00:01:11,203
Because when I hit next

35
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it is the same interval, which is very cool. 

36
00:01:14,031 --> 00:01:15,304
Um so Jeanna just say it again. 

37
00:01:15,304 --> 00:01:16,500
How does the graph show us feet?

38
00:01:18,218 --> 00:01:21,406
[Um, covering more distance in the same amount of time.]

39
00:01:22,453 --> 00:01:24,125
If, okay, If it shows that

40
00:01:24,125 --> 00:01:26,171
you're covering more distance in the same amount of time

41
00:01:26,171 --> 00:01:27,296
would that tell you about speed?

42
00:01:29,248 --> 00:01:29,953
[You speed up]

43
00:01:29,953 --> 00:01:30,625
Okay. 

44
00:01:30,625 --> 00:01:32,108
What if, what's the other one?

45
00:01:32,108 --> 00:01:33,093
How about in the end?

46
00:01:33,093 --> 00:01:34,608
She told me how you would see speeding up.

47
00:01:34,608 --> 00:01:35,576
How would you see slowing down?

48
00:01:36,701 --> 00:01:37,718
Remember rule number one. 

49
00:01:48,718 --> 00:01:50,873
Rule number one: changes in distance. 

50
00:01:50,873 --> 00:01:54,171
How would the distance change over that one-thirtieth of a second,

51
00:01:54,171 --> 00:01:56,280
If, she already told us how

52
00:01:56,280 --> 00:01:57,498
it'd look if you sped up, what about 

53
00:01:57,498 --> 00:01:58,186
slowing down?

54
00:02:17,927 --> 00:02:20,498
[I don't know, it wouldn't change at all]

55
00:02:20,498 --> 00:02:23,359
Okay. Okay.

56
00:02:23,359 --> 00:02:25,889
Yeah, if you aren't going as fast

57
00:02:25,889 --> 00:02:27,873
do you think you'll cover as much ground?

58
00:02:28,780 --> 00:02:30,266
No, it won't change as much. 

59
00:02:30,266 --> 00:02:31,795
Is what she said. It'll change less. 

60
00:02:32,920 --> 00:02:35,312
Exactly. So when you guys talk to me

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about speeds, it's not

62
00:02:36,889 --> 00:02:38,530
that you're looking for

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00:02:38,530 --> 00:02:40,842
steepness necessarily. 

64
00:02:40,842 --> 00:02:43,951
Okay? Steepness is a property of the picture. 

65
00:02:43,951 --> 00:02:46,295
It's not a property or a 

66
00:02:46,295 --> 00:02:47,687
you know, way of describing the scenario.

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00:02:47,687 --> 00:02:50,872
It's a property of the picture that you've drawn. 

68
00:02:50,872 --> 00:02:52,389
Okay. But what it means is 

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00:02:52,389 --> 00:02:54,826
changes in distances and changes in times. 

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00:02:54,826 --> 00:02:57,019
And depending on how those changes are taking place,

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You can argue that it means speeding up, or you can argue