Gravity - Free Essay Examples and Topic Ideas

Why Do We Need Gravity?The role of gravity is much more than just preventing us from floating, it helps the human body to grow and develop. It makes the muscles and bones work hard, keeping them intact. It keeps our body functions running.Effects of Zero GravityWithout gravity, there would be no use of the muscles, so the muscles can lose mass very quickly. Muscle mass can vanish at a rate as high as 5% a week. It also affects bones,…

Introduction Hydrostatic Pressure Hydrostatic pressure is a pressure exerted by fluid from any directions at equilibrium with the presence of gravitational force. Based on this concept,it is learnt that the pressure increases proportionally with the depth/height of the fluid as the weight of fluid exerted downwards increases. The formula for hydrostatic pressure: P=hρg Where, P = pressure (Pa) • = density of liquid (kg/) h = height from object to the surface of the liquid (m) g = force of…

'Gravity' directed by Alfanso Cuaron starring Sandra Bullock and George Clooney in the title roles is hugely heralded as one of the most path breaking movies of recent times in terms of technological advancement in film making and the zest to attempt an entirely humane movie on a concept like space missions. Based almost entirely as a tale in outer space where quite a many things go wrong for the Medical Engineer Dr. Ryan Stone essayed by Sandra Bullock and…

Gravity is the force that is exerted on all physical objects, which pulls it towards the center of the earth, or another large object with mass. According to the “Lab Investigation: Gravity Intro”, gravity is the weakest force that is found in nature. The other three forces are listed in descending order, strong force, electromagnetic force and weak force. Also, Isaac Newton wrote a book about gravity. It was called Theory of Universal Gravitation, and was first published in 1680.…

The Theory of Gravity has been transformed through the last century, from an original and important classical framework to more recent relativistic and then quantum interpretations, eventually culminating in a specific requirement to link it all together with the other forces and create a unified theory of everything. The search for unification is currently very much dependent upon experimentation and raises questions as to the scientific validity of String Theory and whether it exists as science or philosophy - or…

Ticker - Timer Practical Report Introduction This practical is investigating the motion of a trolley as it is placed at the top of an inclined ramp, and is released to roll down the ramp. With the aid of a ticker-timer, the average speed and acceleration can be determined, and using this data, the amount of force that the trolley has acting on it, can be calculated. The ticker-timer is utilised to determine the distance that the trolley travels in each…

Imagine someone doing a bungee jump or someone bouncing on a trampoline and think what is it that keeps pulling them down and not letting them fly off, Gravity the most important force on Earth. What if we didn't have gravity, everyone would be jumping through the air, and people would take more than just one second to fall. Gravity helps objects fall and even if they intend to rise again due to a gain of energy such as elastic,…

Planning: The purpose of this investigation is to collect details about how the weight of an object can affect the speed that a parachute drops. The main aims of the investigation are to find out the way that different forces act on objects when dropped. The forces that act upon the parachute are, gravity and air resistance. Gravity pulls the weight on the parachute down, and air resistance acts against the parachute. A diagram is shown below of how the…

Angry Birds have always been a popular household game amongst young people, including myself. I remember when my much younger cousin asked me to help her to win a game by shooting a bird on a pig, and that is when I realized that winning this game, might need a bit of Mathematics. The gamers are firstly presented with different kinds of birds, with different power abilities. Then, the bird is placed on a slingshot, that shoots out a trajectory,…

The following investigation that I am going to embark on will involve the transfer of energy from one form to another. Usually when there is a transfer of energy from one component to another, these constituents are parts of machines or mechanisms, which are collectively classed as systems. In any one system there could be just one energy transfer or numerous transfers of energy. However, when we are dealing with systems, we must remember that there is no system that…

All objects, when no force is acting upon them, shall remain at the same steady speed, without accelerating or decelerating; so if an object is still, it shall not move and if it is moving then it shall continue moving so long as no force is acting upon them. This was explained by Newton's first law. However it must also be noted that the meaning of "no force" may also be understood as "all forces acting upon a certain object…

The aim of this experiment is to ascertain how the stopping distance of a toy car is affected by the steepness of the angle of the ramp. Diagram Safety Measures There aren't any safety aspects in this investigation. Apparatus During the experiment I used to the following equipment: Ramp 2x Metre Rulers Matchbox car Boss + Clamp Stand Prediction I predict that the steeper the ramp, the further the car will travel Fair Test To ensure that it was a…

The aim of this experiment is to determine whether or not energy is conserved when a ball bearing is rolled down a slope. Six weeks of preliminary work have been carried out ensuring that measurements can be taken quickly with the correct instruments needed for the measurement. Previous knowledge of energy conservation says that energy cannot be created or destroyed. What factors need to be controlled or varied in this experiment? In this experiment many factors need to be considered,…

I know that if factors are changed the car will travel a different distance after leaving the ramp. Background Knowledge There are many factors that can affect this distance. 1. The weight of the car - this will affect the gravitational potential energy of the vehicle, therefore when the vehicle is released the amount of kinetic energy the car has will differ. 2. Surface area of the wheels on the surface - this will affect the amount of frictional energy…

I have decided to investigate how the height from which a squash ball is dropped affects the height of its bounce. When a ball is dropped, it accelerates until it collides with the surface - an impact. It then recoils, and some of the energy is reflected back upwards, causing it to bounce. I believe that as the height from which the ball is dropped changes, the speed of the ball at the moment of impact will also change. This…

Prediction of the relationship between the height used and the change horizontal distance travelled by the spherical mass. I believe that height is directly proportional to distance squared. This means that if the height is doubled the distance will quadruple. Explanation of the prediction in scientific terms. The formula to work out distance travelled is simply = average speed/total time, however there are many other formula used in working these two out. First the speed, or velocity must be obtained.…

JPN Pahang Physics Module Form 4 Chapter 2 : Force and Motion 2. 2. 1 1. FORCE AND MOTION ANALYSING LINEAR MOTION Types of physical quantity: has only a magnitude (i) Scalar quantity: …………………………………………………………………. has both magnitude and direction (ii) Vector quantity: ………………………………………………………………… The difference between distance and displacement: length of the path taken (i) Distance: ………………………………………………………………………… distance of an object from a point in a certain direction (ii) Displacement: …………………………………………………………………… Distance always longer than displacement.Example: The following diagram shows…

To understand a black hole, you must first have an understanding of gravity in space. Imagine yourself on a trampoline; you make an indentation in the trampoline fabric. If someone was to roll a ball past you on the trampoline, it would begin to spiral towards you, down into the indent you have made. This is very similar to the way gravity works in space and time. The 'fabric of spacetime' is an imaginary mesh running through space (see right)…

Physics is the study of energy and how it is transferred from one particle to another. There is certainly a lot of energy transferred between objects and players in the sport of volleyball. A few of the concepts of physics that take place during volleyball include gravity, displacement, velocity, acceleration, projectile motion, and force. These concepts are displayed throughout the different positions on the court. There are three main aspects of volleyball that include physics, the first one being displacement.…

METHOD The experiment is carried out using the apparatus, as set up above. The switch is used to open and close one circuit at a time. The distance for the ball to fall is measured between the ball and the trapdoor with a ruler; a set square is used to see where the ball coincides with the ruler, making it a more accurate measurement. Adjusting the height of the trapdoor can change the distance. When circuit A is closed the…

Sometimes in history, ironically, the greatest contributions to society come from the most inconceivable places. Undoubtedly, Albert Einstein contributed not only innovative thought to his time, but also aided in revolutionizing science especially in physics. His efforts, however, would not have been expected by historians if only his childhood was examined. Einstein was born March 14, 1879 to Herman and Pauline Einstein. Albert was the first child born to this young, Jewish couple. After a year, the couple moved to…

Weightlessness takes place in a free-fall motion. When in free-fall, only the force of gravity (downward force) act upon the object, the object’s weight doesn’t drop but instead, appears to lose as the object fall freely. Newton’s third law states that, ‘for every action, there is an opposite, but equal reaction. ’ Two forces are interacting within each other to equalize its effects. The principle in centripetal force and ballistic trajectory applies in explaining weightlessness / free-fall motion. Effects of…

Newton was known as a natural philosopher during his life but his theories of motion, gravity, light, etc formed the cornerstone of what would become known as physics. He probably contributed more to the science than any single person before or after him. Newton's 1687 publication of the Principia is considered to be among the most influential books in the history of science, laying the groundwork for most of classical mechanics. In this work, Newton described universal gravitation and the…

The main focus of this paper is to explore the latest theories regarding dark matter and dark energy and their relationship. These theories explain the Universe's accelerated expansion rate and also provide insight into why galaxies remain intact despite appearing to lack sufficient mass for gravitational cohesion. This is especially intriguing considering that galaxies rotate at speeds that should disperse their starry elements away from the center.Dark Matter Dark Introduction Recent discoveries are challenging our understanding of the universe, causing…

Introduction In this lab the main focus was projectile motion. A projectile is an object flying through the air that is only under the force of gravity (neglecting air resistance). A projectile moves both horizontally and vertically, which creates a parabolic flight path. In vertical projectile motion there is a constant velocity since there are no forces in the horizontal direction (neglecting drag due to air resistance). Consequently, there is no acceleration in horizontal projectile motion. In vertical projectile motion…

In the early 1990's, one thing was fairly certain about the expansion of the Universe. It might have enough energy density to stop its expansion and recollapse, it might have so little energy density that it would never stop expanding, but gravity was certain to slow the expansion as time went on. Granted, the slowing had not been observed, but, theoretically, the Universe had to slow. The Universe is full of matter and the attractive force of gravity pulls all…

A projectile is an object upon which the only force acting is gravity. Many projectiles not only undergo a vertical motion, but also undergo a horizontal motion. That is, as they move upward or downward they are also moving horizontally. There are the two components of the projectile's motion - horizontal and vertical motion. And since perpendicular components of motion are independent of each other, these two components of motion can be discussed separately. The goal of this part of…

In a world without gravity, one would be weightless, but always nauseous. Because of this, it would be very difficult to complete a lot of your daily activities without throwing up. If you tried to eat something while you and your food are floating around, you will probably have a lot of trouble trying to hold your food down. In 0-g, life would be very hard. Roller coasters are a perfect example of this. I do not do well on…

"Gravity is a force of attraction that exists between any two masses, any two bodies, any two particles. Gravity is not just the attraction between objects and the Earth. It is the attraction that exists between all objects". (NASA gravity 2000) Gravity is a very essential part of life on earth. We are in the exact position in the sun's gravitational field to keep us in orbit and keep life ongoing on our planet. Gravity is a downward force on…

The point in a body or system of bodies at which the whole mass may be considered as concentrated. When an object’s weight is distributed uniformly, the center of gravity lies at its geometrical center. For irregular shaped objects, the center of gravity is near to the concentration of its mass. Equation: Where: X= center of gravity xi= distance of the objects from fulcrum or arbitrary axis mi= mass of the object Sample Problems Suppose your lab partner has a…