Newtons+Notebook

**Law 1** ** An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force. This law is often called "the law of inertia". **

__**Demonstration #1 - Rolling Jars**__ Rolling Jars

**Trial One** What we used: Two jars with nothing in them. What Happened and Why: The jars rolled down the ramp, because the jars were kind of round and the gravity pulled the jars down. They were the same weight and sizes so they stopped in the same position. They lost their energy when they were on the floor, because it was decelerating, because the gravity was pulling it down. **Trial Two** What we used: One jar was filled with stones, and the other with nothing. What Happened and Why: We rolled the jars one by one. First, we rolled the jar without anything in it. When it stopped we marked it, so that we know which one went farther. Then we rolled the jar with stone in it. It rolled forward, but didn’t go far as the empty jar. So, that means that the more weight the faster it stops. **Trial Three** What we used: One jar with stones (198 grams) and one jar with water in it (195 grams) What Happened and Why: This time we filled one of the jar with water. When we rolled the jar with water, and we marked the place where it stopped. After we rolled the jar filled with stones. It was almost the same place as the water jar. We think the water jar went farther because water can push the jar when it’s rolling, but stone jar couldn’t push it forward because they were stuck together so they didn’t had spaces to push it forward like the water does. **Trial Four** What we used: We used the same jars from trial three. What Happened and Why: This time we rolled the jars on the carpet. When we rolled them, they stopped at the same time. We think that happened because of friction. The water couldn’t push very hard on the carpet because the carpet had friction and it is not flat as the floor.

__**Demonstration #2 - Egg, Book, Cup, Water, Toilet Paper Roll and a Slap**__

The hand transferred energy to the pan, which knocked down the tube and the inertia of the egg made it float for half a second and it fell straight down because the hand of gravity pulled down the egg.


 * Inertia** – Inertia is a property of matter in which one thing stays still or if it is moving it keeps going unless acted by another force. In other words, an object will stay still until energy gets transferred into it. For example, when you kick a ball on a PK, it is still until you transfer energy from your foot to the ball.

Mr Dwyer and the Egg [|Satoki and the Egg] [|Jiwon and the Egg] [|Isha and the Egg] [|Koichi and the Egg] [|Emi and the Egg (take 1)] [|Emi and the Egg (take 2)] (Hahaha!)

**Law 2** **Acceleration is produced when a force acts on a mass. The greater the mass (of the object being moved) the greater the amount of force needed (to accelerate the object)**

__ **Demonstration - Newtons Slingshot** __


 * 1) Draw a picture of the Experiment**

- we got seven different types of balls and weighed them - we made a slingshot using a rubber exercise band - we pulled back the balls and let them fly - we marked where each ball landed on the ground (first bounce)
 * 2) Explain what we did**


 * 3) Data**

These are the order of the farthest to shortest and their weights

** i) White Ball (30g) ** ** ii) Orange Ball (55g) ** ** iii) Yellow (29g) ** ** iv) Plastic Bowling Ball (23g) ** ** v) Blue Soft Ball (37g) ** ** vi) Volleyball (194g) ** ** vii) Dodgeball (197g) **


 * 4) Why did we get these results?**

The white ball flew the most because it was very light and was the smallest. The force and mass was strong for the white-ball. The dodgeball was heavy and the gravity pulled it down faster than the white-ball (Koichi).

I think the balls that flew far have the perfect mass and weight for the slingshots energy to push, but the big balls have too much mass and weight for the sling-shot to push (Emi).

The small ball flew farther, and the big and heavier ball didn't fly far. The small ball was the white-ball and the big ball was the dodgeball. The white ball flew farther because it was kind of heavy but smaller, and small objects accelerate more because it's easy to push or fly. The dodgeball didn't go far because it is big and heavy and it didn't accelerate. It was heavy like Koichi pushing Emi and Mr Dwyer. Emi fell because he is light, and Mr D didn't fall because he is heavy (Jiwon)

The white ball was the smallest so it went the farthest, but the Dodgeball was the biggest so it stopped first (Isha).

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 * Videos of the Slingshot:**

**Law 3** **For every action there is an equal and opposite re-action**

__**Demonstration #1 - Pushing Game**__ When we both push against each other, neither of us fall because the forces are reaction against each other and they are almost equal.

__**Demonstration #2 - Balloon Cars**__

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 * Emi** - I let some cars go and made them crash to a balloon, this is an example of Newton's third law because the action, and the balloon is the opposite action and so they make the re-action which is both of them pushing apart.

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 * Isha** - I think this is related to Newtons third law because the balloon was transfreng energy to the car. So, the car can move forward and the balloon is losing it energy while giving energy to the car. So that means the balloon is doing 2 things at the same time, which makes it tired.

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 * Jiwon** - I taped a balloon behind the car, after I let the balloon out then the car went forward.This was an example of Newton]s third law, because the ballon is pushing the car and the balloon had energy. The energy from the balloon goes backward then the car goes forward.

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 * Koichi** - The car moves because the balloon blasted air and the force of the blast pushed the car away from it. It is like a rocket blasting into space, expect the car is not going up.

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 * Satoki** - The ballon blew out air and the car went forward

__**Synthesizing**__ After we studied them all, we used [|HelloSlide] to make a powerpoint presentation that would explain the three laws. Here are our links:


 * Emi** - []


 * Koichi** - []


 * Isha** - []


 * Jiwon**- []