# CBSE Class 9 Physics Gravitation Worksheet

Read and download free pdf of CBSE Class 9 Physics Gravitation Worksheet. Students and teachers of Class 9 Science can get free printable Worksheets for Class 9 Science Chapter 10 Gravitation in PDF format prepared as per the latest syllabus and examination pattern in your schools. Class 9 students should practice questions and answers given here for Science in Class 9 which will help them to improve your knowledge of all important chapters and its topics. Students should also download free pdf of Class 9 Science Worksheets prepared by teachers as per the latest Science books and syllabus issued this academic year and solve important problems with solutions on daily basis to get more score in school exams and tests

## Worksheet for Class 9 Science Chapter 10 Gravitation

Class 9 Science students should refer to the following printable worksheet in Pdf for Chapter 10 Gravitation in Class 9. This test paper with questions and answers for Class 9 will be very useful for exams and help you to score good marks

### Class 9 Science Worksheet for Chapter 10 Gravitation

Question. There are two kinds of balances i.e., a beam balance and a spring balance. If both the balances give the same measure of a given body on the surface of the earth, will they give the same measure on the surface of the moon? Explain.
Answer. Beam balance measure the mass of a body. Since mass of a body remains constant so the beam balance will give the same measure on the surface of the earth and on the surface of the moon.
On the other hand, spring balance measures the weight of a body. Weight of the body W = mg. It means, weight of a body depends upon the value of g. Since value of g on the
moon = 1/6 times the value of g on the earth, so the spring balance shows 1/6 times the weight of the body on the earth at the surface of the moon.

Question. The force of attraction between the two bodies depend upon their masses and distance between them? A student thought that two bricks tied together would fall faster than a single one under the action of gravity. Do you agree with his hypothesis or not? Comment.
Answer. As is known from Newton’s law of gravitation, force of attraction (F) between two bodies is directly proportional to the product of their masses, and inversely proportional to the square of the distance between their centres.
i.e., F ∝ m1 m2, and F ∝ 1/2 d2
The hypothesis of the student is wrong. This is because acceleration due to gravity, with which brick/bricks fall does not depend upon mass of the bricks. So the two bricks tied together would not fall faster than a single one.

Question. The earth is acted upon by gravitation of Sun, even though it does not fall into the Sun.Why?
Answer.  The earth does not fall into the sun due to gravitational pull of sun on earth. This is because earth is not stationary. It is revolving around the sun in a particular orbit. The centripetal force required by the earth for revolution around the sun is provided by gravitational pull of sun on the earth. In other words, gravitational pull of sun on earth is spent up in providing necessary centripetal force required by the earth for revolution around the sun. Hence the earth does not fall into the sun.

Question. The gravitational force acts on all objects in proportion to their masses. Why, then, a heavy object does not fall faster than a light object?
Answer. Acceleration due to gravity does not depend on mass of object. Hence, all bodies fall with the same acceleration provided there is no air or other resistance.

Question. Is value of “g” same at all places on the Earth? Give reason for your answer.
Answer. No, the value of “g” is maximum at the poles and minimum at equator. This variation is because to the oblong shape of the Earth and its rotation about its own axis.

Question. Define the weight of an object on Moon.
Answer. The weight of an object on the Moon is the force with which the Moon attracts that object.

Question. Why does a mug full of water feel lighter inside water?
Answer. A mug of water appears lighter inside the water because a buoyant force acts on the mug when placed inside the water.

Question. What is the importance of universal law of gravitation?
or
Write four phenomenons which were successfully explained using universal law of gravitation.
Answer. Many unconnected phenomenon can be explained by gravitational law successfully.
(i) Force bind us with Earth
(ii) Motion of Moon around Earth
(iii) Motion of planet around Sun
(iv) Tides due to the Moon and Sun

Question. . What is the relation between gravitational force of the Moon with the Earth.
Answer. The gravitational force of the Moon is about one-sixth of what it is on the Earth.

### Multiple Choice Question Class 9 Science Chapter 10 Gravitation

1. Two objects of different masses falling freely near the surface of moon would
(a) have same velocities at any instant
(b) have different accelerations
(c) experience forces of same magnitude
(d) undergo a change in their inertia

2. The value of acceleration due to gravity
(a) is same on equator and poles
(b) is least on poles
(c) is least on equator
(d) increases from pole to equator

3. The gravitational force between two objects is F. If masses of both objects are halved without changing distance between them, then the gravitational force would become
(a) F/4
(b) F/2
(c) F
(d) 2 F

4. A boy is whirling a stone tied with a string in an horizontal circular path. If the string breaks, the stone
(a) will continue to move in the circular path
(b) will move along a straight line towards the centre of the circular path
(c) will move along a straight line tangential to the circular path
(d) will move along a straight line perpendicular to the circular path away from the boy

5. An object is put one by one in three liquids having different densities. The object floats with 1/9, 2/11 and 3/7 parts of their volumes outside the liquid surface in liquids of densities d1, d2 and d3 respectively. Which of the following statement is correct?
(a) d> d> d3
(b) d> d< d3
(c) d< d> d3
(d) d< d< d3

6. In the relation F = G M m/d2, the quantity G
(a) depends on the value of g at the place of observation
(b) is used only when the earth is one of the two masses
(c) is greatest at the surface of the earth
(d) is universal constant of nature

7. Law of gravitation gives the gravitational force between
(a) the earth and a point mass only
(b) the earth and Sun only
(c) any two bodies having some mass
(d) two charged bodies only

8. The value of quantity G in the law of gravitation
(a) depends on mass of earth only
(b) depends on radius of earth only
(c) depends on both mass and radius of earth
(d) is independent of mass and radius of the earth

9. Two particles are placed at some distance. If the mass of each of the two particles is doubled, keeping the distance between them unchanged, the value of gravitational force between them will be
(a) 1/4
(b) 4 times
(c) 1/2 times
(d) unchanged

10. The earth attracts a body of mass 2 kg on its surface with a force of
(a) 9.8 N
(b) 19.6 N
(c) 6.67 x 10–11 N
(d) 2 x 6.67 x 10–11 N

11. A stone dropped from a building takes 4 s to reach the ground. The height of the building is
(a) 19.6 m
(b) 80.4 m
(c) 78.4 m
(d) 156.8 m

12. If ge is acceleration due to gravity on earth and gm is acceleration due to gravity on moon, then
(a) ge = gm
(b) ge < gm
(c) ge = (1/6)gm
(d) gm = (1/6)ge

13. The mass of a body on the surface of earth is 12 kg. If acceleration due to gravity on moon is 1/6 of acceleration due to gravity on earth, then its mass on moon will be
(a) 2 kgf
(b) 72 kg
(c) 12 kg
(d) zero

14. The atmosphere is held to the earth by
(a) gravity
(b) wind
(c) clouds
(d) earth’s magnetic field

15. The force of attraction between two unit point masses separated by a unit distance is called
(a) gravitational potential
(b) acceleration due to gravity
(c) gravitational field
(d) universal gravitational constant

16. The weight of an object at the centre of the earth of radius R is
(a) zero
(b) infinite
(c) R times the weight at the surface of the earth
(d) 1/R2 times the weight at surface of the earth

Question. . Name the scientist in whose honor the SI unit of pressure is named.
Ans : The SI unit of pressure is named after Blaise Pascal.

Question. . Name the force which accelerates a body in free fall.
Ans : Gravitational force of Earth.

Question. . What is the unit of “g”?
Ans : The unit of “g” is ms–2.

Question. . Why value of “g” more or less constant on or near the Earth?
Ans : Radius of Earth does not change much; “g” is more or less constant on or near the Earth.

Question. . What is weightlessness?
Ans : A body is said to be in a state of weightlessness when the reaction of the supporting surface is zero or its apparent weight is zero.

Q1. State the universal law of gravitation.

Ans. Every object in the universe attracts every other object with a force which is proportional to the product of their masses and inversely proportional to the square of the distance between them. The force is along the line joining the centres of two objects

Q2. Write the formula to find the magnitude of the gravitational force between the earth and an object on the surface of the earth.

Ans. The gravitational force between the earth and an object on its surface

Me = Mass of the earth

Q3. What do you mean by free fall?

Ans. Whenever an object falls toward earth under the force of gravity one and no other force is present, the motion of object is said to be “free fall”.

Q4. What do you mean by acceleration due to gravity?

Ans. The acceleration of free fall is the acceleration due to gravity. We can also say the acceleration of an object due to gravitational force of earth acting on it is known as acceleration due to gravity.

Q5. Why is the weight of an object on the moon 1/6th its weight on the earth?

Ans. The weight of an object depends on ‘g’ acceleration due to gravity, and the value of ‘g’ on earth: and moon is not same.

g=Gm/R2

The mass and radius of the earth is more than the mass and radius of the moon.

As W=GMn/R2 the weight of a body on the earth is 6 times more than the weight of a same body on moon.

Q6. Gravitational force acts on all objects in proportion to their masses. Why then, a heavy object does not fall faster than a light object?

Ans. The heavy object when falls, the acceleration due to gravity ‘g’ is acting which is independent of the mass of the body.

g=Gm/R2

Gravitation force is

∴ F and g are different.

Q7. What is the magnitude of the gravitational force between the earth and a 1 kg object on its surface? [Mass of the earth is 6 x 1024 kg and radius of the earth is 6.4 x 106 m].

Ans. The magnitude of the gravitational force between earth and an object is given by the formula.

 CBSE Class 9 Chemistry Matter In Our Surrounding Worksheet
 CBSE Class 9 Chemistry Is Matter Around Us Pure Worksheet
 CBSE Class 9 Chemistry Atoms And Molecules Worksheet
 CBSE Class 9 Chemistry Structure Of Atom Worksheet
 CBSE Class 9 Biology Fundamental Unit Of Life Worksheet
 CBSE Class 9 Biology Tissues Worksheet
 CBSE Class 9 Physics Motion Worksheet
 CBSE Class 9 Physics Force And Laws Of Motion Worksheet
 CBSE Class 9 Physics Gravitation Worksheet
 CBSE Class 9 Physics Work And Energy Worksheet
 CBSE Class 9 Physics Sound Worksheet
 CBSE Class 9 Biology Why Do We Fall Ill Worksheet
 CBSE Class 9 Biology Natural Resources Worksheet
 CBSE Class 9 Biology Improvement In Food Resources Worksheet
 CBSE Class 9 Chemistry Experiments Worksheet CBSE Class 9 Chemistry MCQs On Practical Skills Worksheet CBSE Class 9 Chemistry Practicals Worksheet
 CBSE Class 9 Chemistry Revision Worksheet

## More Study Material

### CBSE Class 9 Science Chapter 10 Gravitation Worksheet

We hope students liked the above worksheet for Chapter 10 Gravitation designed as per the latest syllabus for Class 9 Science released by CBSE. Students of Class 9 should download in Pdf format and practice the questions and solutions given in the above worksheet for Class 9 Science on a daily basis. All the latest worksheets with answers have been developed for Science by referring to the most important and regularly asked topics that the students should learn and practice to get better scores in their class tests and examinations. Studiestoday is the best portal for Class 9 students to get all the latest study material free of cost.

### Worksheet for Science CBSE Class 9 Chapter 10 Gravitation

Expert teachers of studiestoday have referred to the NCERT book for Class 9 Science to develop the Science Class 9 worksheet. If you download the practice worksheet for one chapter daily, you will get higher and better marks in Class 9 exams this year as you will have stronger concepts. Daily questions practice of Science worksheet and its study material will help students to have a stronger understanding of all concepts and also make them experts on all scoring topics. You can easily download and save all revision worksheet for Class 9 Science also from www.studiestoday.com without paying anything in Pdf format. After solving the questions given in the worksheet which have been developed as per the latest course books also refer to the NCERT solutions for Class 9 Science designed by our teachers

#### Chapter 10 Gravitation worksheet Science CBSE Class 9

All worksheets given above for Class 9 Science have been made as per the latest syllabus and books issued for the current academic year. The students of Class 9 can be rest assured that the answers have been also provided by our teachers for all worksheet of Science so that you are able to solve the questions and then compare your answers with the solutions provided by us. We have also provided a lot of MCQ questions for Class 9 Science in the worksheet so that you can solve questions relating to all topics given in each chapter. All study material for Class 9 Science students have been given on studiestoday.

#### Chapter 10 Gravitation CBSE Class 9 Science Worksheet

Regular worksheet practice helps to gain more practice in solving questions to obtain a more comprehensive understanding of Chapter 10 Gravitation concepts. Worksheets play an important role in developing an understanding of Chapter 10 Gravitation in CBSE Class 9. Students can download and save or print all the worksheets, printable assignments, and practice sheets of the above chapter in Class 9 Science in Pdf format from studiestoday. You can print or read them online on your computer or mobile or any other device. After solving these you should also refer to Class 9 Science MCQ Test for the same chapter.

#### Worksheet for CBSE Science Class 9 Chapter 10 Gravitation

CBSE Class 9 Science best textbooks have been used for writing the problems given in the above worksheet. If you have tests coming up then you should revise all concepts relating to Chapter 10 Gravitation and then take out a print of the above worksheet and attempt all problems. We have also provided a lot of other Worksheets for Class 9 Science which you can use to further make yourself better in Science

Where can I download latest CBSE Printable worksheets for Class 9 Science Chapter 10 Gravitation

You can download the CBSE Printable worksheets for Class 9 Science Chapter 10 Gravitation for latest session from StudiesToday.com

Can I download the Printable worksheets of Chapter 10 Gravitation Class 9 Science in Pdf

Yes, you can click on the links above and download Printable worksheets in PDFs for Chapter 10 Gravitation Class 9 for Science

Are the Class 9 Science Chapter 10 Gravitation Printable worksheets available for the latest session

Yes, the Printable worksheets issued for Class 9 Science Chapter 10 Gravitation have been made available here for latest academic session

How can I download the Class 9 Science Chapter 10 Gravitation Printable worksheets

You can easily access the links above and download the Class 9 Printable worksheets Science Chapter 10 Gravitation for each chapter

Is there any charge for the Printable worksheets for Class 9 Science Chapter 10 Gravitation

There is no charge for the Printable worksheets for Class 9 CBSE Science Chapter 10 Gravitation you can download everything free

How can I improve my scores by solving questions given in Printable worksheets in Class 9 Science Chapter 10 Gravitation

Regular revision of practice worksheets given on studiestoday for Class 9 subject Science Chapter 10 Gravitation can help you to score better marks in exams

Are there any websites that offer free test sheets for Class 9 Science Chapter 10 Gravitation

Yes, studiestoday.com provides all latest NCERT Chapter 10 Gravitation Class 9 Science test sheets with answers based on the latest books for the current academic session

Can test papers for Class 9 Science Chapter 10 Gravitation be accessed on mobile devices

Yes, studiestoday provides worksheets in Pdf for Chapter 10 Gravitation Class 9 Science in mobile-friendly format and can be accessed on smartphones and tablets.

Are worksheets for Chapter 10 Gravitation Class 9 Science available in multiple languages

Yes, worksheets for Chapter 10 Gravitation Class 9 Science are available in multiple languages, including English, Hindi

What is the importance of worksheets for CBSE Class 9 Science?

CBSE Class 9 Science worksheets help students practice all concepts given in their books, improve problem-solving skills, and prepare effectively for CBSE exams

What topics are covered in CBSE Class 9 Science Chapter 10 Gravitation worksheets?

CBSE Class 9 Science Chapter 10 Gravitation worksheets cover all topics as per the latest syllabus for current academic year.

How can I use worksheets to improve my Class 9 Science scores?

Regular practice with Class 9 Science worksheets can help you understand all concepts better, you can identify weak areas, and improve your speed and accuracy.

Are there solved examples in Class 9 Science worksheets?

All worksheets for Class 9 Science and for Chapter 10 Gravitation have solved questions with step by step guide for each solution

How often should I practice Class 9 Science Chapter 10 Gravitation worksheets?

Practice atleast one worksheet of Chapter 10 Gravitation every day for Class 9 Science