Types of Equilibrium – What is Equilibrium? – eSaral

Hey, Do you want to learn about the Types of Equilibrium? If so. Then you are at the right place.

## What is Equilibrium?

A body is said to be in translatory equilibrium if the net force acting on the body is zero, $\overrightarrow{\mathrm{F}}_{\text {net }}=0$

If the force are conservative then $\mathrm{F}=-\frac{\mathrm{dU}}{\mathrm{dr}}$

For equilibrium F = 0.

So, $-\frac{d U}{d r}=0$

Or

$\frac{\mathrm{dU}}{\mathrm{dr}}=0$

At equilibrium position slope of U-r graph is zero or the potential energy is optimum (maximum or minimum or constant).

## Types of Equilibrium.

1. Stable Equilibrium
2. Unstable Equilibrium
3. Neutral Equilibrium

### Stable Equilibrium:

When a particle is slightly displaced from equilibrium and it tends to come back towards equilibrium then it is said to be in stable equilibrium

### Unstable Equilibrium:

When a particle is displaced from equilibrium and it tends to move away from equilibrium position then it is said to be in unstable equilibrium

### Neutral Equilibrium:

When a particle is displaced from equilibrium and no force acts on it then the equilibrium is said to be neutral equilibrium

The situation where F = 0 and $\frac{\mathrm{d} \mathrm{U}}{\mathrm{dr}}=0$ can be obtained under three conditions.

Three identical balls are placed in equilibrium in positions as shown in fig. (a), (b), and (c) respectively.

1. The ball is placed inside a smooth spherical shell. This ball is in a stable equilibrium position.
2. The ball is placed over a smooth sphere. This is in the Unstable equilibrium position.
3. The ball is placed on smooth horizontal ground. This ball is in the Neutral equilibrium position.

## Difference Between Stable, Unstable, and Neutral Equilibrium

For a better understanding of this chapter, please check the detailed notes of the Work Energy and Power. To watch Free Learning Videos on physics by Saransh Gupta sir Install the eSaral App.

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NEET Application Form 2020 is going to release in the months of December. National Eligibility cum Entrance Test or NEET (previously known as AIPMT) is the national-level Medical Entrance exam for the aspirants to get admission in MBBS/BDS Courses in various government or private medical colleges affiliated by Medical Council of India. Get the Following details about NEET 2020 here: Examination Mode Important Dates How to Apply? Application Fee Eligibility Criteria Correction in Application Language Choices Exam Pattern NEET 2020 Syllabus NEET Counselling    Recently, the Ministry of Health announced that admission to MBBS courses in medical colleges across the country including JIPMER and all the AIIMS will be through the common national entrance test NEET. So, AIMS and JIPMER are no longer to be held.

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### Application fee

NEET 2020 application form cannot be submitted without paying the prescribed non-refundable application fee.
• General or OBC category have to pay an application fee of Rs 1400,
• Reserved categories such as ST/SC/PWD have to pay Rs 750.

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Indian, Persons of Indian Origin (PIOs), Overseas Citizens of India (OCIs), Foreign Nationals and Non-resident Indians (NRIs) candidates will be considered as eligible and can fill up the NEET 2020 application form.

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The Minimum age limit (General Category) to apply for NEET 2020 exam should be 17 Years. However, the maximum age limit is 25 Years.   Candidates belonging to SC/ST/OBC/PH should have their birthdate between 07.05.1988 and 01.01.2002.

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 Category Age Relaxation SC/ST/OBC/PH 05 Years of Age Relaxation

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The exam includes questions from Physics, Chemistry and Biology curriculum of class XI and XII. Both Physics and Chemistry have 45 questions each. Biology has 90 questions divided equally among Botany and Zoology. The paper will have only multiple-choice questions. 1 mark will be deducted for every incorrect answer. For each correct answer, 4 marks will be awarded. 45 questions are assigned to Physics, Chemistry, Botany and Zoology, each.

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Physics 45 180
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Total 180 Questions 720 Marks

### Syllabus of NEET 2020

#### NEET Syllabus for Physics:

Class 11 Physical world and measurement Kinematics Laws of Motion Work, Energy and Power Motion of System of Particles and Rigid Body Gravitation Properties of Bulk Matter Thermodynamics Behaviour of Perfect Gas and Kinetic Theory Class 12 Electrostatics Current Electricity Magnetic Effects of Current and Magnetism Electromagnetic Induction and Alternating Currents Electromagnetic Waves Optics Dual Nature of Matter and Radiation Atoms and Nuclei Electronic Devices Oscillations and Waves

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Class 11 Some Basic Concepts of Chemistry Structure of Atom Classification of Elements and Periodicity in Properties Chemical Bonding and Molecular Structure States of Matter: Gases and Liquids Thermodynamics Equilibrium Redox Reactions Hydrogen s-Block Element (Alkali and Alkaline earth metals) Some p-Block Elements Organic Chemistry- Some Basic Principles and Techniques Hydrocarbons Environmental Chemistry Class 12 Solid State Solutions Electrochemistry Chemical Kinetics Surface Chemistry General Principles and Processes of Isolation of Elements p- Block Elements d and f Block Elements Coordination Compounds Haloalkanes and Haloarenes Alcohols, Phenols and Ethers Aldehydes, Ketones and Carboxylic Acids Organic Compounds Containing Nitrogen Biomolecules Polymers Chemistry in Everyday Life

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Class 11 Diversity in Living World Structural Organisation in Animals and Plants Cell Structure and Function Plant Physiology Human physiology Class 12 Reproduction Genetics and Evolution Biology and Human Welfare Biotechnology and Its Applications Ecology and environment Result Declaration The exam conducting authority NTA will release the NEET 2020 result on their official site on 4th June, 2020. You can get here the direct link to check the NEET result once it is out. Make sure you have the roll number and date of birth to access the result.