- Johannes Kepler modified the heliocentric model and formulated Kepler's laws of planetary motion.
- Kepler's laws state that planets move in elliptical orbits with the Sun at one focus, planets sweep out equal areas in equal times, and the square of the orbital period is directly proportional to the cube of the radius of the orbit.
- Kepler's laws can be derived from Newton's law of universal gravitation and the concept of circular motion, providing a mathematical relationship between orbital period and radius.
Gravitation has been the most common phenomenon in our lives but somewhere down the line we don't know musch about it. So here is a presentation whic will help you out to know what it is !! I'll be makin it available for download once i submit it in school :P :P ! Coz last one of the brats showed the same presentation that i uploade and unfortunatele his roll number fell before mine ! I was damned..:D :D :P
Kepler’s laws of planetary motion
(1) the orbit of each planet is an ellipse with the Sun atone focus. the first law consequence of the conservation of energy of a planet orbiting the Sun under the effect of a central attraction that varies as the inverse square of distance.
(2) the orbital radius of a planet sweeps out equal areasin equal intervals of time. The second law describing the rate of motion of the planet around its orbit follows directly from the conservation of angular momentum of the planet.
(3) the ratio of the square of a planet’s period (T2) to the cube of the semi-major axis of its orbit (a3) is a constant for all the planets, including the Earth. The third law results from the balance between the force of gravitation attracting the planet towards the Sun and the centrifugal force away from the Sun due to its orbital speed. The third law is easily proved for circular orbits
Gravity Gravitation English Presentation
Tugas Fisika
Tugas Bahasa Inggris
oleh :
Kelas 12 IPA 6 SMA Negeri 1 Yogyakarta tahun 2014
Semangat!!!!!!! SUKSES
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Gravitation has been the most common phenomenon in our lives but somewhere down the line we don't know musch about it. So here is a presentation whic will help you out to know what it is !! I'll be makin it available for download once i submit it in school :P :P ! Coz last one of the brats showed the same presentation that i uploade and unfortunatele his roll number fell before mine ! I was damned..:D :D :P
Kepler’s laws of planetary motion
(1) the orbit of each planet is an ellipse with the Sun atone focus. the first law consequence of the conservation of energy of a planet orbiting the Sun under the effect of a central attraction that varies as the inverse square of distance.
(2) the orbital radius of a planet sweeps out equal areasin equal intervals of time. The second law describing the rate of motion of the planet around its orbit follows directly from the conservation of angular momentum of the planet.
(3) the ratio of the square of a planet’s period (T2) to the cube of the semi-major axis of its orbit (a3) is a constant for all the planets, including the Earth. The third law results from the balance between the force of gravitation attracting the planet towards the Sun and the centrifugal force away from the Sun due to its orbital speed. The third law is easily proved for circular orbits
Gravity Gravitation English Presentation
Tugas Fisika
Tugas Bahasa Inggris
oleh :
Kelas 12 IPA 6 SMA Negeri 1 Yogyakarta tahun 2014
Semangat!!!!!!! SUKSES
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
2. Johannes Kepler, a German astronomist, mathematician and astrologist who
modified the heliocentric model according to Kepler’s Law.
Kepler’s Laws
Physics Form 4
Chapter 3 Gravitation
3. All planets move in elliptical orbits with the Sun at one focus (Law of Orbits)
Minor axis
Major
axis
Sun
Physics Form 4
Chapter 3 Gravitation
4. Physics Form 4
Chapter 3 Gravitation
Ellipse (string and optical properties) - YouTube Video
5. The planets in the Solar System have elliptical shaped orbits.
The Sun always stays on a focus of the ellipse.
The major axis is longer than the minor axis.
Most orbits of the planets in the Solar System have major axis and minor axis of
almost the same length.
As such, the shape of the elliptical orbit of the planets in the Solar System is
almost round.
Planets can be assumed to make circular motion around the Sun.
The radius of orbit is the average value of the distance between the planet and
the Sun.
Physics Form 4
Chapter 3 Gravitation
6. A line that connects a planet to the Sun sweeps out equal areas in equal times
(Law of Areas).
Sun
Elliptical
orbit
Physics Form 4
Chapter 3 Gravitation
7. If a planet takes the same amount of time to move from A to B and from C to D, the
area AFB is the same as the area CFD.
Distance AB is longer than distance CD.
This means the planet is moving at a higher linear speed from A to B than from C
to D.
Physics Form 4
Chapter 3 Gravitation
8. The square of the orbital period of any planet is directly proportional to the cube of the
radius of its orbit (Law of Periods).
Mathematically,
T = orbital period of a planet
r = radius of orbit
2 3
T r
A planet which orbits with a larger radius has a longer orbital period. As such, planets
which are further from the Sun take a longer time to complete one orbit around the Sun.
Physics Form 4
Chapter 3 Gravitation
9.
10. For example, the Earth takes 1 year to make one complete orbit while Saturn takes 29.5 years.
0.2 tahun
0.6 tahun
1.0 tahun
1.9 tahun
11.9 tahun
29.5 tahun
84.0 tahun
164.8 tahun
Utarid
Zuhrah
Bumi
Marikh
Musytari
Zuhal
Uranus
Neptun
Physics Form 4
Chapter 3 Gravitation
11. The Kepler’s Third Law can be formulated using Newton's Law of Gravitation and the
concept of circular motion.
Planets make circular motions around
the Sun. The centripetal force is the
same as the gravitational force
between the Sun and the planet.
Assuming that the orbit of the planet
around the Sun is circular, we can
derive the relationship between the
orbital period of the planet and the
radius of the orbit as in Kepler’s third
law.
Physics Form 4
Chapter 3 Gravitation
12. Gravitational force acting on the planet,
Sun
Planet
m
F
v
M
r
The gravitational force acts as the centripetal force for the planet to create a circular
motion around the Sun.
Centripetal force,
Mass of the Sun = M
Mass of the planet = m
Radius of orbit = r
Gravitational force = F
Linear speed of planet = v
Orbital period = T
2
GMm
F
r
2
mv
F
r
Physics Form 4
Chapter 3 Gravitation
13.
14.
2
2
2
2
2
2 3
1
2
,
2
2
2 into
4
1
Centripetal force Gravitational force
Distance travelled in one complete orbit
Linear speed of planet v
Orbital period
r
v
T
Substit
mv GMm
r r
GM
v
u
r
r GM
T r
T r
te
GM
As GM is constant,
is Kepler’s Third Law
2 3
T r
2 3
T r
Physics Form 4
Chapter 3 Gravitation
15. Solving Problems Using Kepler’s Third Law Formula
From Kepler’s third law, relationship between orbital period, T and radius
of orbit, r is 2
2 3
4
T r
GM
Compare two planets:
For planet 1,
For planet 2,
(1) ÷ (2) gives
2
2 3
2 2
4
2
T r
GM
2
2 3
1 1
4
1
T r
GM
2 3
1 1
2 3
2 2
T r
T r
Physics Form 4
Chapter 3 Gravitation
Planet 1
Planet 2
2
2