Universal Law of Gravitation
Universal Law of Gravitation
The Universal Law of Gravitation:
The law was formulated by Newton. The gravitational force of attraction between any two particles in the universe is directly proportional to the product of the masses of the particles and is inversely proportional to the square of the distance between the particles. The direction of the force is along the line joining the two particles. Let A and B be two particles of masses and
respectively. Let the distance AB = r. By the law of gravitation, the particle A attracts the particle B with a force F, such that
F ∝ (for a given separation between the particles)
Here “G” is a constant known as the universal constant of gravitation. The value of G was experimentally measured in the laboratory by Cavendish, long after Newton’s death. This value is
Its value does not depend on the medium between the two bodies and the masses of the bodies or the distance between them. This law is universal as it is applicable to all bodies, whether the bodies are big or small, whether they are celestial or terrestrial. Suppose the masses of two bodies having 1 kg each and the distance d between them is 1 m, then
F= G [ and
= 1kg and r = 1m]
Then, the universal gravitational constant is defined as the gravitational force between two objects of unit mass each separated by a unit distance from each other placed anywhere in space. The SI unit of G is
The value of G was found out by Henry Cavendish (1731-1810) by using a sensitive balance.
Which of the following statements is not true about the law of gravitation/ | |||
| Right Option : C | |||
| View Explanation |
The force of gravitation between two objects of masses 1 Kg and 2 Kg separated by a distance of 100 cm, is | |||
| Right Option : A | |||
| View Explanation | |||
What will be the acceleration due to gravity if the mass of the planet is doubled and the radius halved? | |||
| Right Option : C | |||
| View Explanation |
Students / Parents Reviews [10]
About Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
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Prisha Gupta
8thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
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10thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
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Ayan Ghosh
8thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
