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# NCERT Exemplar Class 9 Science Chapter 10 Solutions: Gravitation

NCERT Exemplar Class 9 Science Solutions for Chapter 10 ‘Gravitation’ are created by science subject matter experts that will help you grasp the concepts of the chapter. In this chapter of NCERT Class 9 Science Exemplar, you will understand the universal law of gravitation. The two important factors of gravitation are mass and weight that are discussed in the chapter in a detailed manner.

The NCERT Exemplar Class 9 Science Chapter 10 consists of 3 exercises and a total of 26 questions. Understanding the conceptual based questions is still somewhere easy but solving the numerical problems makes everything tough on the go. That is when our team is going to be your study companion.

Our subject matter experts have designed easy to understand solutions for all the NCERT Exemplar problems of Chapter 3 of Class 9 Science and each concept is perfectly explained. These solutions will act as your study guide for the chapter and will help you find the right answers in minutes. Therefore, choosing the team of Instsolv would be a great action on your part.

## Important Topics for NCERT Exemplar Class 9 Science Solutions Chapter 10: Gravitation

Everything that goes up and comes down’ is an important phrase linked to this chapter. Every object in the universe is attracted to another object using a force of attraction. It is known as the law of gravitation or universal law of gravitation. Below are the important topics covered in the chapter:

The Universal Law of Gravitation

Gravitation refers to a force of attraction. Every object in the universe attracts another object by using a force called attraction. The universal law of gravitation or law of gravitation refers to the attraction of forces between two objects.

Freefall

Freefall is the downward motion of an object under the force of gravity. It can be easily understood by taking an example of skydiving, or an object thrown upward will always come downwards.

Mass

The mass of an object is a measure of its inertia. The greater the mass the greater will be the inertia. The mass of an object is constant and does not change from place to place

Weight

• Earth attracts every object with a certain force depending upon its mass and acceleration.
• The weight of an object is the force on the basis of which it is attracted to the earth.
• W = m*g, where w stands for weight, m is mass and g is gravity.

Thrust and Pressure

• This theory explains certain questions like- how a camel runs faster in a desert? Or hoe a heavy army tank just rest upon a set of chains? It explains that the force acts perpendicular to the surface.
• The force acting on an object perpendicular to the surface is called a thrust
• Pressure = thrust/area
• buoyancy – it is a force that is applied upward by fluids when an object is partially or fully immersed in a fluid.
• Why do objects float or sink placed on the surface of the water? It is due to the buoyant law.

Archimedes Principle

• The principle states that the weight of the object immersed in water is equal to the weight of the fluid that is displaced by the object.
• The Archimedes principle is a law of basic fluid mechanics.

Relative Density

• Relative density is the ratio of the mass of the given object and the density of a standard that may be water, gas, etc
• Relative density = density of a substance/density of water

### Exercise Discussion of NCERT Exemplar Class 9 Science Solutions Chapter 10: Gravitation

• The exercise in this chapter of NCERT Exemplar consists of 26 questions in all. There are three types of questions in these exercises – multiple-choice questions, short questions, and long questions.
• The short questions have 15 questions. These can be solved if the chapter is fully done. The questions are based on topics like the magnitude of force by the earth, pressure exertion, etc.
• There are a total of 7 short questions based on relative density and mass. In one questions you have to calculate the average density of the earth.
• The long questions in the exercise are 4 questions. These questions cover the important formulas of the chapter. Questions like how does the force of attraction between two bodies depend on the masses and the distance between them are asked in this exercise.

### Benefits of NCERT Exemplar Class 9 Science Solutions Chapter 10: Gravitation by Instasolv

• The solutions to NCERT Class 9 Exemplar Problems for Science Chapter 10 are given by our team of experts in a step by step manner.
• Our team of professionals makes sure that the chapter is fully prepared before your exams. The team aims at making the chapter simplified so that you can understand all the concepts clearly. This is to avoid confusion and build confidence.
• All this will help you complete the syllabus before time so that there’s enough time to revise the concepts of the chapter.
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