NCERT Class 11 Physics Part 1 Gravitation

Read and download NCERT Class 11 Physics Part 1 Gravitation in NCERT book for Class 11 Physics. You can download latest NCERT eBooks chapter wise in PDF format free from Studiestoday.com. This Physics textbook for Class 11 is designed by NCERT and is very useful for students. Please also refer to the NCERT solutions for Class 11 Physics to understand the answers of the exercise questions given at the end of this chapter

NCERT Book for Class 11 Physics Chapter 8 Gravitation

Class 11 Physics students should refer to the following NCERT Book Chapter 8 Gravitation in Class 11. This NCERT Book for Class 11 Physics will be very useful for exams and help you to score good marks

Chapter 8 Gravitation NCERT Book Class 11

8.1 INTRODUCTION

Early in our lives, we become aware of the tendency of all material objects to be attracted towards the earth. Anything thrown up falls down towards the earth, going uphill is lot more tiring than going downhill, raindrops from the clouds above fall towards the earth and there are many other such phenomena. Historically it was the Italian Physicist Galileo (1564-1642) who recognised the fact that all bodies, irrespective of their masses, are accelerated towards the earth with a constant acceleration. It is said that he made a public demonstration of this fact. To find the truth, he certainly did experiments with bodies rolling down inclined planes and arrived at a value of the acceleration due to gravity which is close to the more accurate value obtained later.

A seemingly unrelated phenomenon, observation of stars, planets and their motion has been the subject of attention in many countries since the earliest of times. Observations since early times recognised stars which appeared in the sky with positions unchanged year after year. The more interesting objects are the planets which seem to have regular motions against the background of stars. The earliest recorded model for planetary motions proposed by Ptolemy about 2000 years ago was a ‘geocentric’ model in which all celestial objects, stars, the sun and the planets, all revolved around the earth. The only motion that was thought to be possible for celestial objects was motion in a circle. Complicated schemes of motion were put forward by Ptolemy in order to describe the observed motion of the planets. The planets were described as moving in circles with the centre of the circles themselves moving in larger circles. Similar theories were also advanced by Indian astronomers some 400 years later. However a more elegant model in which the Sun was the centre around which the planets revolved – the ‘heliocentric’ model – was already mentioned by Aryabhatta (5th century A.D.) in his treatise. A thousand years later, a Polish monk named Nicolas 

Copernicus (1473-1543) proposed a definitive model in which the planets moved in circles around a fixed central sun. His theory was discredited by the church, but notable amongst its supporters was Galileo who had to face prosecution from the state for his beliefs.
It was around the same time as Galileo, a nobleman called Tycho Brahe (1546-1601) hailing from Denmark, spent his entire lifetime recording observations of the planets with the naked eye. His compiled data were analysed later by his assistant Johannes Kepler (1571- 1640). He could extract from the data three elegant laws that now go by the name of Kepler’s laws. These laws were known to Newton and enabled him to make a great scientific leap in proposing his universal law of gravitation.
 
8.2 KEPLER’S LAWS
The three laws of Kepler can be stated as follows:
1. Law of orbits : All planets move in elliptical orbits with the Sun situated at one of the foci

NCERT Class 11 Physics Part 1 Gravation

 

 

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Physics NCERT Book Class 11 Chapter 8 Gravitation

The above NCERT Books for Class 11 Physics Chapter 8 Gravitation have been published by NCERT for latest academic session. The textbook by NCERT for Chapter 8 Gravitation Physics Class 11 is being used by various schools and almost all education boards in India. Teachers have always recommended students to refer to Chapter 8 Gravitation NCERT etextbooks as the exams for Class 11 Physics are always asked as per the syllabus defined in these ebooks. These Class 11 Chapter 8 Gravitation book for Physics also includes collection of question. We have also provided NCERT solutions for Class 11 Physics which have been developed by teachers of StudiesToday.com after thorough review of the latest book and based on pattern of questions in upcoming exams for Class 11 students.

NCERT Book Class 11 Physics Chapter 8 Gravitation

The latest NCERT book for Chapter 8 Gravitation pdf have been published by NCERT based on the latest research done for each topic which has to be taught to students in all classes. The books for Class 11 Physics Chapter 8 Gravitation are designed to enhance the overall understanding of students. All Class 11 NCERT textbooks have been written in an easy to understand language which will help to enhance the overall level of Class 11 students. 

Chapter 8 Gravitation NCERT Book Class 11 Physics

As the students of Class 11 need the books for their regular studies, we have provided all NCERT book for Chapter 8 Gravitation in pdf here for free download. All pdf NCERT books available here for Class 11 will help them to read on their mobile or computers. They can take a print of the Class 11 Physics NCERT Book Chapter 8 Gravitation pdf easily and use them for studies. The NCERT textbooks for Class 11 Physics have been provided chapter-wise and can be downloaded for free of cost. 

Class 11 Physics Chapter 8 Gravitation NCERT Book

Along with Physics Class 11 NCERT Book in Pdf for Chapter 8 Gravitation we have provided all NCERT Books in English Medium for Class 11 which will be really helpful for students who have opted for english language as a medium. Class 11 students will need their books in English so we have provided them here for all subjects in Class 11.

Class 11 Chapter 8 Gravitation NCERT Book Physics

For Class 11 Chapter 8 Gravitation we have provided books for students who have opted for Hindi and Urdu medium too. You can click on the links provided above to download all Hindi medium Class 11 Physics Chapter 8 Gravitation book in easy to read pdf format. These books will help Class 11 Physics students to understand all topics and also strictly follow latest syllabus for their studies. If you are looking to download the pdf version of Class 11 Physics Chapter 8 Gravitation textbook issued by NCERT then you have come to the correct website

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