1
00:00:01,026 --> 00:00:05,106
>> As long as it goes in an
arc, the stream will stay taut.

2
00:00:07,016 --> 00:00:14,456
That has to do with the physics.

3
00:00:14,526 --> 00:00:15,786
Okay, here we go.

4
00:00:17,366 --> 00:00:19,716
I've got my yo-yo bag.

5
00:00:20,226 --> 00:00:24,646
In my yo-yo bag I
have a free-spinning,

6
00:00:24,946 --> 00:00:26,386
non-returning yo-yo.

7
00:00:28,696 --> 00:00:30,056
Okay [fizzing sound] hear that?

8
00:00:30,056 --> 00:00:35,446
Okay, that's the sound of
precision ball bearings.

9
00:00:36,416 --> 00:00:38,016
So here, spin a yo-yo.

10
00:00:38,016 --> 00:00:39,996
I've got to do orbit the Earth.

11
00:00:40,596 --> 00:00:43,096
There we go and then
it's orbiting slowly

12
00:00:43,156 --> 00:00:48,426
but it's spinning fast and then
I'm going to do around the moon.

13
00:00:48,426 --> 00:00:49,036
Look at that.

14
00:00:49,036 --> 00:00:51,826
And then I'm going to
do the tether assist.

15
00:00:52,526 --> 00:00:54,216
Now, normally we call that "Man

16
00:00:54,216 --> 00:00:56,006
on the Trapeze,"
but it won't catch.

17
00:00:56,676 --> 00:00:59,756
And so it just bounces
off the string.

18
00:01:00,186 --> 00:01:02,766
And it's kind of like the
tether technology we use

19
00:01:02,796 --> 00:01:03,936
for satellites and things.

20
00:01:04,526 --> 00:01:05,916
So I call that the
"Tether Assist."

21
00:01:08,896 --> 00:01:14,016
And let's see if I can
get it to come back down.

22
00:01:14,016 --> 00:01:14,976
Ah, there we go.

23
00:01:16,586 --> 00:01:19,506
And because I'm in
space and I can,

24
00:01:19,976 --> 00:01:23,296
I get to name these yo-yo
tricks as I invent them.

25
00:01:24,676 --> 00:01:26,836
So I call this "Shoot
the Planets."

26
00:01:28,696 --> 00:01:34,216
And I'm spending more time
training to fly the robotic arms

27
00:01:34,216 --> 00:01:36,876
so I can snag this little
spacecraft coming up here

28
00:01:36,876 --> 00:01:38,686
in a week or so called "Drag."

29
00:01:39,596 --> 00:01:41,306
And I haven't been
spending as much time

30
00:01:41,376 --> 00:01:44,136
as I should working
on my yo-yo training.

31
00:01:44,856 --> 00:01:46,476
So I've been ignoring
my yo-yo training,

32
00:01:46,546 --> 00:01:49,446
so it may take a couple of
times to get this trick correct.

33
00:01:50,296 --> 00:01:52,966
And it just shows how I've
got misplaced priorities.

34
00:01:54,456 --> 00:01:54,956
Here we go.

35
00:02:00,656 --> 00:02:03,216
Oh, so far so good,
orbit the Earth.

36
00:02:05,466 --> 00:02:08,846
And now, it's like keep
it moving in an arc,

37
00:02:08,896 --> 00:02:10,796
there's two, there's three.

38
00:02:13,246 --> 00:02:14,706
Oh, oh, how about that.

39
00:02:14,706 --> 00:02:15,946
Let's see if I can
get it to come back.

40
00:02:21,076 --> 00:02:24,926
Ah, okay. So now it's
spinning really fast.

41
00:02:25,676 --> 00:02:27,556
We'll go ahead around
-- oh, I like this.

42
00:02:28,476 --> 00:02:31,126
I'm going to do "Shoot
the Planets" again.

43
00:02:31,616 --> 00:02:35,296
So here's that, here's
that, here's that.

44
00:02:36,906 --> 00:02:38,496
There, that was a good one.

45
00:02:38,956 --> 00:02:39,496
That's a keeper.

46
00:02:43,496 --> 00:02:45,786
Okay, now I call
this "The Asteroid"

47
00:02:45,846 --> 00:02:47,596
because it's basically
uncontrolled,

48
00:02:47,646 --> 00:02:50,726
the string is lived and it's
just bouncing back and forth.

49
00:02:51,216 --> 00:02:52,406
So this trick is "The Asteroid."

50
00:02:52,406 --> 00:02:55,006
And you have to be careful
because if it comes back

51
00:02:55,406 --> 00:02:58,616
in an uncontrolled way, it could
end up hitting you in the head,

52
00:02:59,036 --> 00:03:00,516
and I call that the "G Bonk."

53
00:03:03,596 --> 00:03:07,386
Another thing about
yo-yos, there's a lot

54
00:03:07,456 --> 00:03:09,526
of physics involved in
this, a lot of physics.

55
00:03:10,366 --> 00:03:12,356
It change of angular momentum.

56
00:03:13,046 --> 00:03:17,116
With the yo-yo spinning, angular
momentum of the yo-yo moving

57
00:03:17,306 --> 00:03:22,176
in an arc as a system and then
the linear momentum of it going

58
00:03:22,256 --> 00:03:24,776
in and out of the string,
and then, of course,

59
00:03:24,776 --> 00:03:27,676
there's energy expenditure and
that's because you got bearings

60
00:03:27,676 --> 00:03:30,276
and friction and drag
with the air around it,

61
00:03:30,276 --> 00:03:31,596
and drag with the
air is kind of small.

62
00:03:32,246 --> 00:03:34,706
So you have all of
these neat pieces

63
00:03:34,706 --> 00:03:36,056
of physics working on this.

64
00:03:42,106 --> 00:03:44,306
And it's good to
understand the physics

65
00:03:44,606 --> 00:03:46,766
of your recreational activities.

66
00:03:46,986 --> 00:03:50,776
So if you like doing
yo-yos, you should read

67
00:03:50,776 --> 00:03:53,496
up about how they work,
how the physics works.

68
00:03:54,436 --> 00:03:56,136
And it will benefit
you in several ways.

69
00:03:56,226 --> 00:03:57,816
One way it'll benefit
you is you'll be able

70
00:03:57,816 --> 00:03:59,776
to have some delightful
conversation.

71
00:03:59,776 --> 00:04:01,946
You can impress people
by talking

72
00:04:01,946 --> 00:04:03,336
about the physics of your yo-yo.

73
00:04:03,666 --> 00:04:07,626
And if you're a guy, just
think you can impress the gals

74
00:04:07,986 --> 00:04:10,156
by talking about the physics
of how your yo-yo works.

75
00:04:10,526 --> 00:04:13,186
And, of course, there's
going to be a classic gals

76
00:04:13,186 --> 00:04:15,276
that won't be interested in
that; you won't impress them.

77
00:04:15,556 --> 00:04:17,466
But then those are the kind
you don't want to be around.

78
00:04:17,466 --> 00:04:21,386
And then if you're a gal,
and your yo-yo, again,

79
00:04:21,386 --> 00:04:23,896
learn the physics, and when
you talk about the physics

80
00:04:23,896 --> 00:04:25,376
of how the yo-yo
works in addition

81
00:04:25,426 --> 00:04:28,296
to doing your yo-yo tricks,
you can impress the guys.

82
00:04:28,606 --> 00:04:29,946
And, of course, there's
going to be some guys

83
00:04:30,076 --> 00:04:32,306
that won't be impressed
because they don't like physics.

84
00:04:33,806 --> 00:04:34,796
And you don't want to hang

85
00:04:34,796 --> 00:04:36,286
around those kind
of guys anyway.

86
00:04:36,756 --> 00:04:39,576
But there's even a more
important aspect of this.

87
00:04:40,136 --> 00:04:42,636
If you learn the physics of how
the yo-yo works and you can talk

88
00:04:42,636 --> 00:04:45,346
about that, that means you've
learned a certain amount

89
00:04:45,406 --> 00:04:45,776
of physics.

90
00:04:46,276 --> 00:04:48,196
And when you learn a
technical subject like physics,

91
00:04:48,646 --> 00:04:52,216
guess what, it helps
you get a good job.

92
00:04:53,436 --> 00:04:56,266
And then, of course, when you
have a good job you can afford

93
00:04:56,266 --> 00:05:01,416
to buy these fancy yo-yos and
you can use your spare time then

94
00:05:01,726 --> 00:05:03,856
to do even more work
with your yo-yos.

95
00:05:05,026 --> 00:05:06,746
So here we go, let's see
if we can do it again.

96
00:05:07,956 --> 00:05:15,516
So orbit the Earth, orbit the
moon, orbit the moon again.

97
00:05:16,696 --> 00:05:21,086
There's a tether assist,
okay, tester assist,

98
00:05:24,116 --> 00:05:25,976
shoot the planets and come back.

99
00:05:26,076 --> 00:05:27,976
Hot dog, look at that!

100
00:05:28,516 --> 00:05:32,586
[ Silence ]

101
00:05:33,086 --> 00:05:34,696
Again, I'm going to try
"Shoot the Planets" again.

102
00:05:35,496 --> 00:05:38,736
Ah, that's a string jam.

103
00:05:39,266 --> 00:05:41,276
Oh, man! And it hurts
your finger.

104
00:05:41,976 --> 00:05:42,906
It hate it when that happens.

105
00:05:44,106 --> 00:05:47,326
Let's see if I could get this.

106
00:05:50,316 --> 00:05:53,186
One of the neat things about
video is that you can edit

107
00:05:53,186 --> 00:05:55,926
out all these takes when you're
gooning [phonetic] up, you know.

108
00:05:56,346 --> 00:05:57,676
And then you can make it look