What is "Newton's First Law"?
Sir Isaac Newton. He was born over a hundred years ago on Christmas day and a lot of people know Isaac Newton for his discovery of gravity. Well, we're going to talk today about Isaac Newton's First Law of Motion. Now, In that First Law of Motion, he said, "When an object is in motion, it wants to stay in motion and when an object is at rest, it wants to stay at rest until acted upon by some outside source". That's a lot of words to remember so I have to do it my way. This is my interpretation of Sir Isaac Newton's law. I call it the 'Law of Laziness' and I say that because things like to keep on doing what they're already doing. If they are not moving, they want to keep not moving. If they are moving, they want to keep moving unless acted on by something else. So, the Law of Laziness. Let me show you just a quick demo of the Law of Laziness. Now, this is an empty jar and we're going to place a card on top. Just a regular playing card and you can use a penny, nickle or I have a little nut here we're going to place on top. Now if I take this card and get it out of the way fast enough, that nut that's on there is so lazy that it's not gonna want to move. So I can probably pull that card out, the nut's not gonna want to move and once the card's out, the only thing it can do is drop into the jar. I'm going to move it out of there very quickly, by snapping a pen across the card and that shows you that, that is really a lazy object and actually heavier objects are lazier objects. Now, I'd like to show you this a little more dramatically. That was kind of fun, but let's do it a little better. Now, I need to set this out of the way and we're going to use three little tumblers that have water in them. I have water in them because the objects that are going to drop in there, I don't necessarily want them to break or break the tumblers. The next thing we need is a pizza cardboard. Now, this pizza cardboard has three areas marked on here. This is where the tumblers would be. Now, I'm going to line this up so that, I have to get down this way and line it up so that they are directly under where I am looking and then I want to go this way and make sure they are under there so that when the objects drop into the containers, everything will be fine. Now, we're going to set the objects on top of these rolled up playing cards. Ok, we'll just set those there and then we're going to use these objects. These are eggs. These are raw eggs. So hopefully we don't have a mishap and the eggs drop directly into the container below. Each egg, and maybe they won't even break. Ok, I can't, I have tried a number of times but I can't pull it out fast enough so I have to use another method to do that. I'm going to use a broom. Just a regular broom. I'm going to take the broom and place it on the floor and bend the bristles so that this kind of acts like a spring. Ok now, here' s what we're going to do: with the broom in this position, I'm going to pull it back. The first thing the broom is going to do is hit the cardboard and the cardboard is going to go flying. So don't watch the cardboard. Then, once the cardboard is out of the way, this is going to continue but it's going to hit the table and the table is going to stop it from hitting any of the eggs. Once the cardboard is out of the way and this is stopped, hopefully, the eggs will drop directly into the cups and not break all over. Ok. We'll pull it back. We'll count to three. One. Two. Three. Yeah! It worked! I'll show you too that these were not just hard boiled eggs. These were raw eggs. Yes. Newton's First Law. The Law of Laziness.
