1
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Whoops!

2
00:00:18,380 --> 00:00:20,120
What was that for?

3
00:00:20,120 --> 00:00:21,939
I'm doing an experiment.

4
00:00:21,940 --> 00:00:24,640
You can come up and watch if you'd like.

5
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Greetings and salutations, I'm Galileo.

6
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I'm doing an experiment on mass and
weight.

7
00:00:32,380 --> 00:00:33,840
What's that?

8
00:00:33,980 --> 00:00:35,720
I will show you.

9
00:00:35,720 --> 00:00:38,080
Could you get me those balls over there?

10
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Wow, this one weighs always a lot.

11
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It must be heavier than this one.

12
00:00:47,220 --> 00:00:49,860
Hold on, do you know the difference between mass and weight?

13
00:00:50,300 --> 00:00:51,720
Aren't they the same thing?

14
00:00:51,840 --> 00:00:54,920
No, they are not.  Mass is  how much stuff is in an object.

15
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We call that stuff matter. It
stays the same no matter where it is.

16
00:00:58,880 --> 00:01:00,220
So what's weight?

17
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Weight is the effect of
gravity on an object.

18
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It's different depending on the planet that it's on.

19
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So, if I take these two balls and drop them at

20
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the same height at the same time, which
one do you think will hit the ground first?

21
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The heavier one, obviously.

22
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Alright, let's find out.

23
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Here watch this.

24
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They both hit the ground at the same time?

25
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Yes, that's because objects of the same shape and size will fall at the same speed

26
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no matter what their weight or mass.

27
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So, let's review what you learned.

28
00:01:40,860 --> 00:01:44,840
Uh, that objects will fall at the same speed no matter what they weigh.

29
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And, also weight and mass are two different things.

30
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Mass is how much stuff is in an object,
and weight is what gravity does to that stuff.

31
00:01:53,880 --> 00:01:56,520
Exactly!