Year Twelve Topic One Essay

1289 words - 6 pages

1. Distinguish between inertial and non-inertial frames of reference.
Frames of reference are coordinate systems or objects with respect to which we take measurements. (1)
A non-inertial frame of reference is one that is accelerating with fictitious or inertial forces. In these frames observers have to predicate the existence of these ‘forces’ to maintain the validity of Newton’s laws.
An inertial frame of reference is one that is moving with constant velocity or is it at rest, holding Newton’s first law of Inertia. No frame is more correct then another, however, some are simpler. An example could be the stars.(2)
2. Analyse the changing acceleration of a rocket during launch in ...view middle of the document...

Hence the forces on the astronauts increase. The g-forces increase as minimal friction occurs when the density of the atmosphere decreases with the increasing height of the rocket. (5)
3. Discuss the importance of Newtons law of universal gravitation in understanding and calculating the motion of satellites
Simplistically Newton’s Law of Universal Gravitation is that an object attracts every other object in the universe and the two factors that determine the force of the attraction are:
1. The mass of each of the two objects
2. The distances between their centres of mass.

Represented mathematically by:

where, F = force of attraction between objects
G = universal gravitational constant (which is equal to 6.67 x 10-11 N m2 kg-2)
m1 = mass of object 1
m2 = mass of object 2
d = distance between their centres of mass. (6)
Gravitation provides the centripetal force that produces the circular motion that is the satellite’s orbit around a planet. Therefore, it can be said that:
Gravitational force = Centripetal force
A planet revolving around the sun in a circular orbit or radius r, the centripetal force is provided by the gravitational attraction between the planet and the sun. If the mass of the planet is m and the mass of the sun is M, then:

The following expressions can be derived, from the relationships described in the information above:

The second equation describes the relationship between the radius of an orbit and the period for any (and all) satellites, natural and artificial, orbiting the earth and planets and comets orbiting the sun. It is also Kepler’s third law known as Keplers Law of Periods a necessary consequence of Newton’s Law of Universal Gravitation. (7)

4. Describe how the slingshot effect provides greater speed for space probes
The slingshot effect is also known as a planetary swing by or a gravity-assist manoeuvre. It is performed to achieve an increase in speed and/or a change of direction.
A spacecraft is aimed close to a planet. As it approaches, the spacecraft is caught by the gravitational field of the planet, and swings around it. The speed acquired is then sufficient to throw the spacecraft back out again, away from the planet. By controlling the approach, the outcome of the manoeuvre can be manipulated.
As the probe approaches a planet it is accelerated by the gravitational attraction of the planet, causing it to speed up relative to the planet. As the probe passes the planet, its speed is reduced ,however, relative to the sun, its speed has increased. The probe picks up angular momentum from the planet as it loses an equal amount. (8)


5. Outline the features of the aether model for the transmission of light
The ancient Greeks spoke of the earth as being surrounded by water, then air and...

Other Essays Like Year Twelve Topic One

the giver book report

1134 words - 5 pages ceremonies that age from one to twelve and after twelve they are known as adults. Each and every year the community comes together and celebrates the child turning into an adult. At age twelve the children are chosen for a specific role in the community. They can’t even pick what they want to do for the rest of their lives. Their jobs are chosen by their elders. However when Jonas turns twelve he is assigned a special role. He is supposed to be a

Lowering Drinking Age Essay

649 words - 3 pages throughout their whole life. Maturity is not something a person gains when he or she turns twenty one. While gaining maturity a person’s mind is developing mentally and physically. Since the government can determine a twelve year old has developed enough to take a dose of medication, then an eighteen year old has developed enough to drink beer. Finally, if the drinking age is lowered then college students will not go sneaking around at

This Is A Soc. Essay About The Effects Of Tv Violence On Young Children Adn Their Development

1136 words - 5 pages down the road. My topic deals with chapter eleven in the book; family, and chapter twelve; education. I chose this topic because I am worried about my brother and sister watching too much violence. They are the future and if the children of the future are becoming violent now, how will they be in ten, or fifteen years?The ability to be creative is an important factor in the development of a young child's mind. By sitting down and watching TV for a

Chinese Zodiac

734 words - 3 pages year. So, its origin is associated with astrology. Each animal sign is usually related with an earthly branch, so the animal years were called Zi Rat, Chou Ox, Yin Tiger, Mao Rabbit, Chen Dragon, Si Snake, Wu Horse, Wei Sheep, Shen Monkey, You Rooster, Xu Dog and Hai Pig. Chinese Zodiac Stories Legend has it that one day the gods ordered that animals be designated as signs of each year and the twelve that arrived first were selected

Legalizing Marijuana

1015 words - 5 pages they spend on these “criminals” for better purposes. I also feel strongly that there are other worse drugs than marijuana that are legal. Karen Kaplan states that alcohol is involved in the death of 88,000 people per year. also states that cigarette smoking causes one of every five deaths in the United States. These statistics show the harshness of both nicotine and alcohol yet both are still legal in the U.S. There was a prohibition

Lens of Hunger Games

964 words - 4 pages In The Hunger Games there is a constant battle between life and death. There are twelve separate districts, in other words states, and a place called the Capital. These places make up their country known as Phanem. Every year there is an event called the Hunger Games that take place in the Capital. For the game, there is a boy and a girl from each district that represent their own district. Each of them trains and represents themselves to the

Pros and Cons to Vaccination in Children

1780 words - 8 pages three diseases that cause coughs, rashes, fevers and many other symptoms(CDC).  Just as with the chicken pox vaccination, the MMR vaccination also requires administration in two doses.  Doctors administer the first dose between 12-15 months and the second dose between four to six years of age.  This vaccine is known as the most effective and safest vaccine. In 1962, one year before doctors administered the measles vaccination to people, almost

Before I Die

731 words - 3 pages , travel around the world, be homeless for a week, and lastly serve in the military for a while. This is the story of why I want to make my ideas come to life. Books, I rather write than read, but telling stories and sharing experiences never gets old. There is just abounding topics to write about in a single persons head! My book title would more than likely be “small steps.” It would be about a twelve- year- old young woman who is trying to find

How to Write an Essay

854 words - 4 pages , characters and setting could not be any more different Although both stories share the same topic that is tradition and how nobody thinks to challenge it, the two detailed stories portray very different themes based upon this one topic. Suzanne Collins and the directors of The Hunger games take audience members and readers on a journey all about the love and sacrifice Katniss Everdeen demonstrates. Katniss demonstrates true sacrifice by

The Wild Quest

803 words - 4 pages journalists from town to town following the ups and downs of the race. During the time she spends in the Yukon and Alaska, she sleeps in the back rooms of stores on the floor, and hitchhikes in cars and planes from one town to the next. Although most of the teams are from the United States, there are also a few from other countries such as Canada, Jamaica, and the Czech. Each year there are about 25 to 35 teams who enter the race, but approximately only

Chapter 3 Sample of a Thesis

1731 words - 7 pages must attend. The school offers varieties of club from sports-related clubs to academic-related clubs. Each student must attend one particular club for the entire school year. Club meetings are only held twice a month. The club provides activities that are club-related for the students to participate in. Every student will participate in their respective club activities. Because of the accomplishment of the school in both academic

Related Papers

101 Ways To Kill Bestbriend Essay

1439 words - 6 pages consumer through the inclusion of photographs as well as structural concerns over the strength of the novel’s spine, before outlining issues regarding the photographs impact on the reading of the novel. 10 11. Your turn » Is this book suitable for year 8 study? Why, why not? 11 12. The novel ‘Millions’, by Frank Cottrell Boyce, is not suitable for year 8 study. It is does not include excitement and adventure to engage twelve year olds so the novel

First Year Of Baby's Life Essay

571 words - 3 pages FIRST YEAR OF BABY’S LIFE As a new mom, this topic best suits me. A new-born's first year of life is the very important stage in a baby's development. We can divide this into four equal parts. In the first three months, the baby's only few needs are feeding, sleeping, and some exploring of his/her surroundings. They will wake up crying in need of a feeding. Most of the babies sleep with feeding. Some babies explore their

Intelligence Analysis

891 words - 4 pages . One-inch (1”) marginsc. Times New Roman fontd. Twelve (12) pitche. Not including your title page, this assignment should be 4 pages. This does include your annotated bibliography.f. Double space, except for your bibliography’s citations (see example below).2. Citation Format: Turabian. As stated in the Academic Integrity Briefings, information taken directly from another source must be placed in quotations and cited following the Turabian

Ray Bradbury Essay

658 words - 3 pages futuristic technology (which isn’t too far off today), he had never driven a car and did not even own one. Ray Bradbury was born on August 22, 1920, in Waukegan, Illinois. His father was a telephone lineman. The family moved to Los Angeles in 1934 and after graduating from secondary school, and young Bradbury got a job selling newspapers on street corners. He began to write short stories and got into setting up his own magazine, but it was only