Gravitation - Video
9868233590Gravitation - Video Lecture
More Physics Free Demo Videos
Introduction
0:00
Gravitation
0:35
Universal Law of Gravitation
1:33
Universal Law of Gravitation:Mathematical form
5:52
Problem 1
6:41
Gravitational Constant:Cavendish Experiment
16:04
Unit of “G”
20:02
Problem 1
20:57
Gravitational Potential Energy
22:08
Expression of Gravitational Potential Energy
25:08
Gravitational Potential
35:03
Problem 1
37:55
Problem2
41:41
Escape velocity
46:37
Expression for Escape Velocity
49:08
Escape velocity on Moon
57:14
Problem 1
59:03
Earth satellites:Natural Satellites
1:00:53
Earth satellites:Artifical Satellites
1:01:52
Earth satellites:Time Period
1:03:16
Energy of an orbiting satellites
1:08:53
Problem 1
1:11:07
Earth Satellites
1:14:26
Geostationary satellites
1:17:16
Polar Satellites
1:19:11
Problem 1
1:19:48
Weightlessness
1:23:39
Weightlessness in Satellites
1:25:53
System of Particles and Rotational Motion
Class 11 Physics Video (Go Main Menu)
NEET / CBSE / NCERT / ICSE
Physics
Gravitation-Video Lecture
Related Topics
Motion in a straight line
Chemical Bonding & Molecular Structure
System of Particles and Rotational Motion
Overview
Gravitation
Gravitation is a fundamental force of nature that governs the motion of objects throughout the universe. It is the attractive force that draws two bodies toward one another, resulting in a pull that depends on their masses and the distance separating them. This force not only keeps us anchored to the Earth but also plays a vital role in the movement of celestial bodies, such as planets, moons, and stars. The understanding of gravitation has significantly evolved over the centuries. In the late 17th century, Sir Isaac Newton was among the first to mathematically describe this force through his Universal Law of Gravitation.
Newton Law of Gravitation
- Gravitation is the property of matter due to which two bodies always attract each other.
- It states that every particle in the universe attracts all other particles with a force which is directly commensurate to the product of their masses and is inversely commensurate to the square of the distance between them.
Gravitational Field
- It is the region around a mass where its gravitational effects can be observed. Gravitational field due to a body extends till infinity.
- Strength of the gravitational field decreases on moving away from a body.
(i) At infinite gravitational field is zero.
(ii) Gravitational field ∝ mass
- Gravitational field is conservative in nature.
- There are two ways to measure the strength of the gravitational field.
(i) Gravitational field intensity.
(ii) Gravitational potential
Gravitation Class 11 Physics NCERT Chapter 7
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In this we will cover
1. Three equal masses of m kg each are fixed at the vertices of an equilateral triangle ABC.
a. What is the force acting on a mass 2m placed at the centroid G of the triangle?
b. What is the force if the mass at the vertex A is doubled? Take AG=BG=CG=1m.
2. Calculate the gravitational force of attraction between two lead ball of masses 20kg and 10kg separated by a distance of 10cm.
3. Two earth satellites A and B, each of mass mm are to be launched into circular orbits about earth's centre at altitudes 6400km and 19200km respectively. The radius of earth is 6400km. Find the ratio of their potential energies.
4. Find the potential energy of a system of four particles placed at the vertices of a square of side l. Also, obtain the potential at the centre of the square.
5. What is the escape velocity from jupiter given that its mass is 300 times that of the Earth and its radius is 10 times larger, given that the escape velocity from the earth’s surface 11.2 kms-1.
6. A satellite is revolving in circular orbit at a height of 1000 km from the surface of the Earth. Calculate the orbital velocity and time of revolution. The radius of the Earth is 6400 km and the mass of the Earth is 6 × 10^24 kg.
7. A 400 kg satellite is in a circular orbit of radius 2RE about the Earth. How much energy is required to transfer it to a circular orbit of radius 4RE? What are the changes in the kinetic and potential energies?
8. NCERT notes class 11 physics Gravitation
9. Class 11 physics Gravitation
10. NCERT class 11 physics chapter 8
11. NCERT class 11 physics chapter 8 Gravitation
12. NCERT solutions class 11 physics chapter 8 Gravitation
13. Class 11 physics Gravitation JEE questions
Below topics are covered in this video
Introduction
0:00
Gravitation
0:35
Universal Law of Gravitation
1:33
Universal Law of Gravitation:Mathematical form
5:52
Problem 1
6:41
Gravitational Constant:Cavendish Experiment
16:04
Unit of “G”
20:02
Problem 1
20:57
Gravitational Potential Energy
22:08
Expression of Gravitational Potential Energy
25:08
Gravitational Potential
35:03
Problem 1
37:55
Problem2
41:41
Escape velocity
46:37
Expression for Escape Velocity
49:08
Escape velocity on Moon
57:14
Problem 1
59:03
Earth satellites:Natural Satellites
1:00:53
Earth satellites:Artifical Satellites
1:01:52
Earth satellites:Time Period
1:03:16
Energy of an orbiting satellites
1:08:53
Problem 1
1:11:07
Earth Satellites
1:14:26
Geostationary satellites
1:17:16
Polar Satellites
1:19:11
Problem 1
1:19:48
Weightlessness
1:23:39
Weightlessness in Satellites
1:25:53
