## Physics 2017-2018

In October 2017, I had a class of physic. I learn about different forces in an object like a force of normal, the force of gravity, apply force and many more forces. I also get to learn about kinematic equations:

the picture from http://www.physicsclassroom.com

Furthermore, I learned about static friction and kinetic friction.

In class, I did an experiment with an object about kinetic friction.

 Material Trial 1 degrees Trial 2 degrees Trial 3 degrees Total degrees Avg degrees Coefficient of static friction Wood 20° 23° 31° 74° 24.67° 0.46° Sand Paper #1 51° 51° 57° 159° 53° 1.33° Sand Paper #2 45° 45° 53° 143° 46.67° 1.06° Sand Paper #3 45° 41° 41° 127° 42.33° 0.91° Sand Paper #4 42° 51° 51° 144° 48° 1.11° Sand Paper #5 51° 42° 51° 144° 48° 1.11°

Here what we analyzed:

Our hypothesis before doing this experiment we thought that sandpaper # 4 and #5 will have the same angle because it is the same type of sandpaper. We also thought that the board itself has less friction so the angle for the object to start moving might be less than the other, like sandpaper. So the rougher the sandpaper is, the more friction force there will be since it’s going to have a bigger angle and takes more force to be able to move the object. So, sandpaper #4 and #5 will have the most friction and needs angle than the wood and sandpaper #1, #2 and #3 because since their roughness is less the #4 and #5.

Based on the experiment, the max average angle was 53 degrees and from that, the biggest minimum angle to make the object slide down is 1.33. The average coefficient of static friction is 0.997. Therefore, the average angle is 43.78.

The real thing might affect the data are: the measurement of the angle is not accurate, the speed that we pushed the board to go up, some sandpaper is not correctly stuck placed board(it was kind of curve surface not flat), we keep the board moving, we didn’t place the object at the same place every time, the shakiness of our hand pushing the board, we only measure when the object is moving we didn’t know exactly when it started to move and we started in different angle most of the time.

## Literacy 2017-2018

In August 2017, I had a class with Literacy. In this class so far I learned many from it. I learned to edit our own paper better, write an essay, write a good introduction, a good hook, use higher vocabulary, to shorten something but still means the same way, use transition word and much more that I can’t even write it all down. This class we had a project that learns to write a “coming of age” essay. In this project we write a true experience that happened in our lives and change our lives, that is the becoming of age essay.

Here is some part of my essay:
On September 15, 2007, I was sleeping near my mother, suddenly I heard the sound of sadness, heartbroken, and everyone was crying. I immediately thought of my grandpa because I knew that he was very sick. I never thought he would pass away and left me all the sadness with me. I felt so sad and felt like there was no hope in life. I will never forget the memories and what he has taught me.

## Changing Cambodia 2015-2016

The things that I think should be change in Cambodia is Environment(trash, plastic using). The problem with trash people in cambodia just throwing the rubbish around and everywhere. It not good for the country because when the visitors come to Cambodia and they see the trash everywhere so they don’t want to come to Cambodia. If one visitor think like that they will tell their friends to not come to Cambodia. About the plastic in Cambodia, plastic it really bad to people and trees also animals. Also people they don’t know how to reuse, reduce and recycle the plastic. I see in Cambodia people just throwing the plastic around so I want to show them about the problem about that. Also I want to show Cambodian people to learn how to reduce reuse and recycle the plastic. So that can make our environment better than before. I really want Cambodian people to about plastic so they can help our country and their family.Plastic it take long time to destroy. Plastic have a lot of chemicals it can make people sick or die by the plastic.

I had told people by sharation in Liger and I explain about the problem that I think. I had told my
family and I wrote a book call”Say NO to Plastic Bags”. I think it a really good opportunity to share a about the problem in our country so we can make change to our country. When I explain about the problem and I try to give as many solutions that I have as I can.

I try to change in a small community by let’s them use cloth bags. Before we change the country we change our self first and It try to use cloth bags when I buy somethings. Also my team try to do like me too. I also try to reduce plastics that I use everyday. Sometimes when the seller give me so many plastic bags and more that what I need I told them to take it back.

In 3D Design class we try to help the students in Cambodia to use the computers. 150 school in Cambodia have computers lab but they only learn typing from it. So the minister of education in Cambodia want to team to teach them about 3D design so they have a better view with with computers and it might help their future or Cambodia because of 3D design.We thought that the really great opportunity for us the help Cambodia and to improve our skill because when we teach other people we also learn like experience so it good for use and we must choose to do it. We have three programs to use Blender, 123d design and Free Cad. First we choose to work on 123D design. We have a lesson to teach some students in one school. As the life in change so we have to be flexible and 123D design have a problem with the computer that they have so we now work on Free Cad. Our team come up many solution to help them but we only use one of them, it’s the tutorial videos about how to use tools in 3D design.

I have change Cambodia by tell the kids in my province (where I live) to don’t throw the rubbish all around the place. I know that it hard for the kids to do but I try to help. Some of the kids they try to help but some they don’t. It really hard to change the people that older than you because when we tell them they always said you just the kids I am older than you I know what I need to do. When I ask them when we throw rubbish around is it good?. All the people that I ask said not good they know that is not good but they not practice. They know what they can do to help Cambodia about plastic but they not practice. SO I think I should tell the kids and it work!!!!. Some of the people that I tell them about the plastic some they practice but some not. Last holiday I went to my province and I don’t see a lot of rubbish around so I feel that I also can help change Cambodia also. Than I started to share with them and show them how to Reduce, Reuse and Recycle. And all of my family member all practice it. This year I feel I change Cambodia by teaching, and share the thing that I learn to Cambodia people not just old people but the kids and I also help clearing too.

-Rathanak Sovann