Newton's Three Laws of Motion

Hello people, today is quite a clearing information blog of the previous things that I was talking about the Motions. So let's start.

The first law is basically law of inertia. What is inertia? I will give you an example.If you are in the car and when the your mom steps the break, you are body will go forward instead of sticking on the seat. This is the example of inertia. Also on the train. When the train departures, your body moves backward. And when the train stops, you move forward. These are because of inertia. You body tends to stay still  when it departures and tends to go forward when it stops.

 

Next I'll talk about the second law. Newton's second law is F=ma. So mass is kg, the original weight. Do you want to know the difference between mass and weight? Look up my previous blog. So lets say the mass of the box is 10kg and the acceleration is 5mph. So the force added there is 50N because it is 5*10. Well, this is basically everything about the second law.
Lastly, let me talk about the Newton's third law. This takes the motion's action and reaction. This means.. I'll give you an example. Lets say rocket wants to fly up in the sky. To fly, you will see the force working against the ground. So the way is upward and the force added is towards the ground. So for something to move itself, there must be the third law working.

 

 



Yay I am done. See you next week!

Gravity

Hey guys! I'm here. Today, I brought a new topic. It is gravity I am going to talk about it. Do you know what gravity is? Actually, this is really a important thing through out your life. You know what? You are actually depending on gravity right now, sitting wherever you are at. HEHE

So~ What is gravity?
Gravity is the natural force of attraction exerted by a celestial body, such as Earth, upon objects at or near its surface, tending to draw them toward the center of the body.As it is in the definition, the common example of the gravity is the person standing on the Earth. Earth pulls everything towards to the center and this force is called gravity. Did you ever heard about Galileo? You will hear someday in the future,,
Well, we have a lot of theories to talk about him. The one thing I am going to talk about is the thing about the gravity. You might have heard about the leaning Tower of Pisa, right? Galileo had an experiment on the top of the tower. He dropped two objects that has a different mass and saw that both objects reached the ground at the same time. This had a big affect on the whole world and this gave a result that if the object reaches the highest velocity of an object and then fall, the time of the both objects does reach the ground at the same time.

After Galileo made this theory, Isaac Newton was born which is creepy at the same time..
You know what Newton did? Well, he made a three laws of motion (the first law is at my previous blog~) and then he found out the "Gravity". The time apple had fallen on the Newton had made a question about the "Force" something that pulls all the objects downward. And he had studied and then he discovered about the universal gravitation.

This tells that all the universe works by the gravity. By the way, this is a huge discover.
To give some examples of the universal gravitation, lets talk about sun. Sun is having a huge mass that it has more "power(in my word)" that can pull the other planets stronger than it selves. But I know that you are thinking that 'why are the planets not going towards the sun?' Well, that is because each of the planets also have a force that tends to go outward. But since the distance of the sun is far, the forces are equal. That makes the planets to not get far and not get closed.

Okay. So gravity depends on two facts: Mass and distance. I can tell you this all by the Sun and the Earth. I told you up there that since the sun is far away, the force that is pulling the Earth is weak, right? And I also told you that the reason sun has more gravitational force than any other planet is because sun has the huge mass. Solved it!
There are people who are confused with the mass and weight. I will tell you the difference. The mass is the object that takes up the space. How about weight? Weight is the amount of gravity that needs to be pulled.  Lets say the mass of the human is 90 kg. In the earth, it is also 90 kg. This is the mass. Then how about weight? The person will have 882N in the Earth earth because Weight= 9.8 mass. So if this person's weight is 882N, it will be 147N in the moon because the weight in the moon is 1/6 of the earth. So did you got it??
So this is all about my blog for today. I have specific information about Isaac Newton and the first law of the motion in the previous blogs, so check it out! Today, I got a definition of the gravity in dictionary.com and that the rest of the information, I got it from my head.
So see you next week! And thank you.

Force

Hello people! I am back now. Long time no post, right? Well, I am here and I am going to talk about "Force" today. Yay! Please read to the end even it's bored.So what is force? Force is a push or pull  upon an object resulting from object's interaction.
You know when you play golf, golf club pushes the golf ball forward and it makes it fly. That is pushing used by force. When you type something on the keyboard, that is pushing even though it need small amount of force. And pushing your friend is also putting force in to it (Pushing friend isn't cool, so never do it).


Newton
Do you know what N stands for? It is Newton. This is the unit of the force. As what it is called, Sir Issac Newton had discovered it and that is why it is N.  Well, I must tell you how to get the force (I mean in equation). N(force)= mass*acceleration. For example, if there is 5kg of box and the object is moving by 2m/s^2, the force person is pushing the box will be 10N because 5*2=10. Easy right?


Now let's talk about thrust. So, thrust is force that can be proved by Newton's second and third law. This is force of reaction. For example, say you want to jump. You will try to go upward. You body is flying upward, right? But your feet will press the ground to have a process of jumping. This is called Thrust. You push downward to jump. Got it?


Net Force
Now what is Net Force?(look at the image)
Net force is the force added together. For example, if I am pushing the box with 5N and other person help you out and push with the force with 10N, the net force will be 15N. You get it now? But if somebody push against that person with same force above, the box will go backward 5N because it is 5-10.




Next balanced and unbalanced force. This one is really simple. As the word says, it is the force balanced and unbalanced. I will give you examples for each forces. If there is two people pushing an object against each other with same force, that is balanced force. The force is balanced. When there are people pushing against with different force, that is unbalanced. You know if this happens, one side will get pushed.
centripetal force

Now lastly!!! I will talk about centripetal force. Many people get confused with centrifugal force and centripetal force. It is important to know the difference. Both force occurs at the round place like circle. Centripetal force is a force that tends to go round. For example, lets say you have a heavy thing like marble on the edge of the thread. You hold the tope of the thread and put marble on the bottom side. Then you spin. The marble will go round, round and round. You will also realize it when you hold you had still, the marble will keep spin. This force that tends to spin is called centripetal force. Then, centrifugal force now. Before this, you know this that everything tends to go forward right? With the same material, when you spin and then instead of stopping you let it go, it will fly away going strait. By this, you can say that centripetal and centrifugal force is always 90 degrees.

I got couple informations at my science textbook and mostly, I knew stuff. Haha.
 Okay this is end of force today! Each paragraph had different explaination and this will be easier to read. I hope you learned alot today. Thank you for reading.