Last Updated on August 26, 2024 by XAM CONTENT
Hello students, we are providing case study questions for class 9 science. Case study questions are the new question format that is introduced in CBSE board. The resources for case study questions are very less. So, to help students we have created chapterwise case study questions for class 9 science. In this article, you will find case study questions for cbse class 9 science chapter 9 Gravitation.
| Chapter | Gravitation |
| Type of Questions | Case Study Questions |
| Nature of Questions | Competency Based Questions |
| Board | CBSE |
| Class | 9 |
| Subject | Science |
| Theme | Moving Things, People and Ideas |
| Useful for | Class 9 Studying Students |
| Answers provided | Yes |
| Difficulty level | Mentioned |
| Important Link | Class 9 Science Chapterwise Case Study |
Case Study Questions on Gravitation
Questions
Question 1:
Pallavi Mam was demonstrating an experiment in his class with the setup as shown in the figure below.
She took an eraser, sharpener, steel spoon, plastic ruler, pencil, compass and rubber band and asked the students to place them on the surface of the water. Students observed that a few objects float on the surface of water while a few sink in water.
Read the given passage carefully and give the answer of the following questions:
Q1. An object floats in a liquid if the buoyant force is:
a. zero
b. greater than its weight
c. less than its weight
d. equal to its weight
Difficulty Level: Easy
Q 2. An object sinks in a liquid if the buoyant force is:
a. zero
b. greater than its weight
c. less than its weight
d. equal to its weight
Difficulty Level: Easy
Q 3. The buoyant force on an object immersed in a liquid act:
a. in the vertically upward direction
b. in the vertically downward direction
c. at an angle of 900 to the direction in which weight of the object acts.
d. at an angle of 450 to the direction in which weight of the object acts.
Difficulty Level: Medium
Q 4. The magnitude of buoyant force depends on the:
a. density of liquid
b. volume of liquid
c. weight of the object
d. viscosity of liquid
Difficulty Level: Medium
Q 5. Magnitude of buoyant force is given by:
a. Newton’s first law
b. Archimedes’ principle
c. Newton’s second law
d. None of these
Difficulty Level: Medium
Answers
- (b) greater than its weight
- (c) less than its weight
- (a) in the vertically upward direction
Explanation: The buoyant force on an object immersed in a liquid always acts vertically upwards, that is, in a direction opposite to the weight of the object. - (a) density of liquid
- (b) Archimedes’ principle
Explanation: Archimedes’ principle states that ‘when a body is immersed fully or partially in a fluid, it experiences an upward force (buoyant force) that is equal to the weight of the fluid displaced by it.’
Question 2:
What do aching feet, a falling apple and the orbit of the Moon have in common? Each is caused by the gravitational force. An apple falls from a tree because of the same force acting a few metres above Earth’s surface. And the Moon orbits Earth because gravity is able to supply the necessary centripetal force at a distance of hundreds of millions of metres. Sir Isaac Newton was the first scientist to precisely define the gravitational force, and to show that it could explain both falling bodies and astronomical motions.
The gravitational force is always attractive and it depends only on the masses involved and the distance between them (Newton’s universal law of gravitation).
Read the given passage carefully and give the answer of the following questions:
Q 1. What is gravitational force?
Q 2. Briefly explain why Newton pondered over the existence of gravitation?
Q 3. Define the universal gravitational constant.
Q 4. State the value of G. Who obtained it for the first time?
Q 5. ‘Several phenomena of celestial bodies were believed to be unconnected but universal law of gravitation was successful to explain them.’ Mention any two phenomena.
Answers
- All objects (with mass) in the universe attract each other. This force of attraction between objects is called the gravitational force.
- It is said an apple fell on Newton’s head when he was sitting under a tree. He thought if Earth attracts an apple, can it also attract the Moon? Is the force same in both cases? This led to the study on gravitation.
- The universal gravitational constant is numerically equal to the force of attraction between two unit masses when they are separated by a unit distance as measured from their centres.
- The accepted value of G is 6.673 x 10-11 N-m2 kg-2. The value of G was found out by Henry Cavendish by using a sensitive balance.
- Two phenomena explained by universal law of gravitation are:
(i) the force that binds us to the Earth, and
(ii) the motion of the Moon around the Earth.
Also check
Case study questions for other chapters of class 9 science is given below.
- Work and Energy Class 9 Case Study Questions Science Chapter 10
- Gravitation Class 9 Case Study Questions Science Chapter 9
- Force and Laws of Motion Class 9 Case Study Questions Science Chapter 8
- Motion Class 9 Case Study Questions Science Chapter 7
- Tissues Class 9 Case Study Questions Science Chapter 6
- The Fundamental Unit of Life Class 9 Case Study Questions Science Chapter 5
- Is Matter Around Us Pure Class 9 Case Study Questions Science Chapter 2
- Matter in Our Surroundings Class 9 Case Study Questions Science Chapter 1
We hope the given case study questions for Gravitation Class 9 helps you in your learning.
Helpful Links for CBSE Class 9 Science Preparation
- Download Latest Sample Papers for CBSE Class 9 Science
- Download Worksheets for CBSE Class 9 Science
- Download Chapter Tests for CBSE Class 9 Science
- Download Case Study Question Bank for CBSE Class 9 Science
- Download Numerical Problems for CBSE Class 9 Physics
- Download Important MCQs for CBSE Class 9 Physics
Topics from which case study questions may be asked
- Gravitation: Gravitation; Universal Law of Gravitation
- Force of Gravitation of the earth (gravity)
- Acceleration due to Gravity
- Mass and Weight
- Free fall
- Floatation: Thrust and Pressure.
- Archimedes’ Principle; Buoyancy.
Gravitational Force is the force of attraction between any two objects in the universe.
Gravity is the force with which the Earth pulls the objects towards its centre.
Universal Law of Gravitation was given by Isaac Newton and states that, ‘the force of attraction between any two objects in the universe is directly proportional to the product of their masses and inversely proportional to the square of distance between them’.
The direction of the gravitational force is along the line joining the centres of two object.
For further practice on case study questions related to Gravitation Class 9 Science, we recommend exploring the link given below.
Quiz
| Topic | Gravitation |
| Useful for | CBSE Class 9 Students |
| Type of Questions | MCQs |
| No. of Questions | 45 |
| Solutions | Instant Solutions after Completion of Quiz |
| Quiz Link | Click here to Take Test |
| Price | Free |
How to take quiz or test using the given link
It’s quite simple!
Step 1: Click on the given link. You will see the below screen.
Step 2: Fill in the necessary details. There is no need to register. Just fill your email and name and click on the button “Take Assessment”. The below screen will appear.
Step 3: Click on start assessment. Now you are ready to take test.
Frequently Asked Questions (FAQs) on Gravitation Case Study Questions
Q1: What are case study questions for CBSE examinations?
A1: Case study questions in CBSE examinations typically involve scenarios or real-life examples, requiring students to apply their understanding of concepts to solve problems or analyze situations.
Q2: Why are case study questions important for understanding class 9 science chapters?
A2: Case study questions provide a practical context for students to apply theoretical knowledge to real-world situations, fostering deeper understanding and critical thinking skills.
Q3: How should students approach answering case study questions for CBSE?
A3: Students should carefully read the case study, identify the key issues or problems presented, analyze the information provided, apply relevant concepts and principles of chemical reactions and equations, and formulate well-supported solutions or responses.
Q4: Are there any resources available online for students to practice case study questions on class 9 science chapters for CBSE exams?
A4: Yes, several educational websites offer case study questions for CBSE students preparing for science examinations. We also offer a collection of case study questions for all classes and subject on our website. Visit our website to access these questions and enhance your learning experience. If you need more case study questions for your preparation, then you visit Physics Gurukul website.
Q5: How can students effectively prepare for case study questions on “Gravitation” for CBSE exams?
A5: Effective preparation strategies include regular revision of concepts, solving practice questions, analyzing case studies from previous exams, seeking clarification on doubts, and consulting with teachers or peers for guidance and support.
Q6: How can teachers incorporate case study questions on “Gravitation” class 9 science into classroom teaching?
A6: Teachers can integrate case studies into lesson plans, group discussions, or interactive activities to engage students in active learning, promote problem-solving skills, and facilitate a deeper understanding of “Force and Laws of Motion”.
Q7: When is the Importance of the Universal Law of Gravitation?
A7: The universal law of gravitation successfully explained several phenomena which are as follows:
(i) the force that binds us to Earth,
(ii) the motion of the Moon around the Earth,
(iii) the motion of planets around the Sun, and
(iv) the tides due to the Moon and the Sun.
Q8: What are the Applications of Archimedes’ Principle?
A8: It is used in:
(i) designing ships and submarines.
(ii) lactometers (used to determine the purity of a sample of milk).
(iii) hydrometers (used for determining density of liquids).
Q9: If gravitational force acts between all objects, why don’t the two objects in a room move towards each other?
A9: The two objects in a room do not move towards each other because of their small masses, the gravitational force of attraction between them is very, very weak.
Q10: When a body is thrown upwards, its velocity becomes zero at the highest point. What will be its acceleration at this point?
A10: The acceleration at this point is equal to the value of g in the downward direction
Q11: How does the weight of a body vary from poles to equator?
A11: The weight of a body decreases from poles to equator because the force of gravitation is more at poles than at the equator.
Q12: What do you mean by buoyancy?
A12: The upward force exerted by a liquid on any object immersed in it is known as buoyant force or upthrust.
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