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Physics

Gravity

by Justin



​Why I Chose This Topic

I chose this topic because gravity is a very important part of our lives, we couldn't live without it. Gravity is what holds us here on Earth instead of just drifting into space. Our bodies are also designed to withstand the pull of gravity, without it, the body relaxes in a state of weightlessness because it is not fighting the pull of gravity.
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Science Concept 

The egg drop experiment's purpose is to show the concepts of momentum and collision by making a container to protect the egg from breaking when it is dropped from a high place. The egg drop shows the basic concepts of force, acceleration, and gravity. This project demonstrates Isaac Newton's first law of motion which states that objects remain at rest or traveling at constant speed unless a force acts on them to change their motion. In other words, the object will be at a stand-still until gravity can have its effect on the object. The equation for Newton’s first law of motion is F=ma. The “F” stands for force, “m” is for the mass, and the “a” is for acceleration. This equation can be used when an object's mass is constant. 
Sometimes, one of the goals groups of students make is to try and use the least amount of material as possible and keep the egg safe. If a group of people want to challenge themselves even more, they can experiment to see who can drop the egg the highest and the egg not break. Egg drop projects combine problem solving skills with basic principles of physics and engineering.

Newton's second law has to do with the relationship between the object's mass, its acceleration, and the amount of force it gives. The heavier the object is, and the faster the object is traveling, the more force it exerts. Gravity causes falling objects to accelerate at a rate of 32.2 feet per second squared. If you reduce the amount of mass in the egg container, you will be reducing the amount of force it gives as it falls.


Newton's third law states that for every action, there is an equal and opposite reaction. This means when you put force on an object, the object exerts force back. For example, when you are jumping, you are putting force into the ground, even though you were pushing away from the ground, the ground also pushed you. This example can help understand why an egg breaks when it hits the ground; the ground is returning the force from the egg as it meets the ground. Using shock-absorbing materials can help reduce the amount of force given between the ground and the egg.
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Application

 Gravity is very important to all living creatures. We could not live here on Earth without it, which is why it is one of the fundamental forces. The sun's gravity is what keeps Earth in orbit around it, keeping us at a perfect, comfortable distance so we can live on earth without being too hot or too cold. It keeps our atmosphere and the air we need to breathe. Without it, we all would simply float away. People are so used to living with gravity, in fact, our bodies are so used to the gravitational pull of the Earth that our bones and muscles will get weak without it. Gravity is what keeps our world going.

Gravity is a property of matter, or stuff. All matter is attracted to all other matter. The more matter there is, and the closer objects are to each other, the more attraction force has. And unlike magnetism and electricity, which can either repel or attract, gravity will always pull objects toward each other.
The human body also has its own gravitational pull, but it’s so little compared to the Earth that the Earth's gravitational pull will always win.


Long exposure to zero gravity, such as during space missions, leads to a few structural and functional changes in the human body. While the influence of zero gravity on our physical functions
has been largely been looked into, the effects on decision making are not completely understood yet. Given the technical limitations and the expected gap of several minutes in communication with Earth, knowing the impact of altered gravity on how people will make decisions is essential.


The results of research suggest that people also suffer
changes in cognition and perception when under conditions of zero gravity. The absence of gravity can be deeply unsettling, and can potentially change performance levels in multiple ways. This suggests that astronauts may benefit from cognitive enhancement training to help them with the effects of altered gravity on the brain, and to reassure successful and safe space missions.
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Famous Scientist 

Isaac Newton, or Sir Isaac Newton, is an English physicist and mathematician. He was born on December 25, 1642 and died on March 20, 1727. He was also the top figure in the Scientific Revolution. In mechanics, his three laws of motion, the basic principles of modern physics, resulted in the making of the law of universal gravitation.
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Career Path

Physics is the
science that deals with the structure of matter and its interactions between the fundamental elements of the observable universe. Its main idea of this study encompasses not only the behavior of objects under the action of forces but also the nature and origin of gravitational, electromagnetic, and nuclear force fields. There are six branches to the study of physics, which includes mechanics, thermodynamics, electromagnetism, relativity, and acoustic.
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