CBSE Class 9 Science Gravitation Set B

Read and download free pdf of CBSE Class 9 Science Gravitation Set B. Get printable school Assignments for Class 9 Science. Class 9 students should practise questions and answers given here for Chapter 10 Gravitation Science in Class 9 which will help them to strengthen their understanding of all important topics. Students should also download free pdf of Printable Worksheets for Class 9 Science prepared as per the latest books and syllabus issued by NCERT, CBSE, KVS and do problems daily to score better marks in tests and examinations

Assignment for Class 9 Science Chapter 10 Gravitation

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

Chapter 10 Gravitation Class 9 Science Assignment

Gravitation

Q 1 Name the force due to which a body performs circular motion.

Q 2 What is the nature of gravitational force?

Q 3 What is the numerical value of gravitational constant?

Q 4 Define thurst.

Q 5 Name the force experienced by the body when it is immersed in a liquid.

Q 6 What do you mean by the weight of the body?

Q 7 What is the acceleration of free fall?

Q 8 What is the weight of an object on moon?

Q 9 Why the cutting edge of a knife should be as sharp as possible?

Q 10 Iron nails sinks in water.Why?

Q 11 Explain, why the value of ‗g‘ is greater at poles than at equator.

Q 12 Why does a truck or motor-bus has much wider tyres?

Q 13 What do you mean by force of buoyancy?

Q 14 State Archimedes‘ principle.

 

Q 1 An object dropped from a height always fall towards earth. Why?

Q 2 Weight of an object on earth and moon is different. Why?

Q 3 In your daily life you experience force of gravitation. Give some examples,

Q 4 What is gravitation?

Q 5 State Newton‘s law of motion.

Q 6 What do you understand by centripetal force?

Q 7 What do you understand by gravitational force?

Q 8 What do you understand by free fall of an object?

Q 9 How does the force of gravitation between two objects change on reducing the distance to half?

Q 10 How will you calculate relative density of a cork using Archimedes‘s Principle?

Q 11 (i) How do fishes float in water?

        (ii) Write the conditions that takes place when a solid is immersed in a fluid.

Q 12 The force on a phonogram needle of cross-section of radius of 0.01cm, is 1.5N. Find the pressure it exerts on the record in (i) Pa (ii) atm

Q 13 What do you understand by relative density? What is the unit of relative density? Manoj have a metal block of dimension 25cm x 10cm x 5cm. Now, if the mass of the block is 5kg, then calculate the greatest and least pressure exerted by the block?

Q 14 A piece of iron is totally immersed in water. If its density is 7.8 x 103kg/m3 and volume is 10-4m3 then calculate

        (i) The upthrust

        (ii) Apparent weight of iron piece in water

 

Exam Questions NCERT Class 9 Science Chapter 10 Gravitation

Question. . Two objects of masses M1 and M2 are dropped in vacuum from a height above the surface of Earth (M1 is greater than M2). Which one will reach the ground first and why?
Ans : Since acceleration is the rate of change of velocity, and velocity is the rate of change of position, objects dropped from the same height will feel the same acceleration, and so move with the same rate of increasing velocity, and so hit the ground at the same time, independent of their masses.

Question. . How does the force of gravitation between two objects change when the distance between them is reduced to half?
Ans : When the distance between the objects is reduced to half the gravitational force increases by four times the original force.

Question. . What is Gravitation?
Ans : Gravitation is the force of attraction between two objects in the universe :
(i) Gravitation may be the attraction of objects by the Earth.
Example : If a body is dropped from a certain height, it falls downwards due to Earth’s gravity.
If a body is thrown upwards, it reaches a certain height and then falls downwards due to the Earth’s gravity.
(ii) Gravitation may be the attraction between objects in outer space : Attraction between the Earth and Moon. Attraction between the Sun and planets.

Question. . Why are the ends of tools like knives, pins and nails pointed?
Ans : The ends of tools such as pins, knives and nails are made pointed to increase the effect of the force. Because the pointed ends have much smaller areas. As result for a certain amount of force applied, the pressure becomes very large. That is why sharp edges needs very small force to cut fruits or vegetables.

Question. . Why are the ends of tools like knives, pins and nails pointed?
Ans : The ends of tools such as pins, knives and nails are made pointed to increase the effect of the force. Because the pointed ends have much smaller areas. As result for a certain amount of force applied, the pressure becomes very large. That is why sharp edges needs very small force to cut fruits or vegetables.

 

Please refer to attached file for CBSE Class 9 Science Gravitation Set B

Chapter 02 Is Matter Around Us Pure?
CBSE Class 9 Science Is Matter around Us Pure assignment
Chapter 07 Diversity In Living Organisms
CBSE Class 9 Science Diversity in Living Organisms assignment
Chapter 15 Improvement In Food Resources
CBSE Class 9 Science Improvement in Food Resources assignment

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CBSE Class 9 Science Chapter 10 Gravitation Assignment

We hope you liked the above assignment for Chapter 10 Gravitation which has been designed as per the latest syllabus for Class 9 Science released by CBSE. Students of Class 9 should download and practice the above Assignments for Class 9 Science regularly. We have provided all types of questions like MCQs, short answer questions, objective questions and long answer questions in the Class 9 Science practice sheet in Pdf. All questions have been designed for Science by looking into the pattern of problems asked in previous year examinations. 

Assignment for Science CBSE Class 9 Chapter 10 Gravitation

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Chapter 10 Gravitation Assignment Science CBSE Class 9

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Chapter 10 Gravitation Assignment CBSE Class 9 Science

Regular assignment practice helps to get a more comprehensive understanding of Chapter 10 Gravitation concepts. Assignments play a crucial role in understanding Chapter 10 Gravitation in CBSE Class 9. Students can download all the assignments of the same chapter in Class 9 Science in Pdf format. You can print them or read them online on your computer or mobile.

CBSE Science Class 9 Chapter 10 Gravitation Assignment

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The Chapter 10 Gravitation Class 9 Science Assignments have been designed based on latest CBSE syllabus for Class 9 Science issued for the current academic year

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All topics given in Chapter 10 Gravitation Science Class 9 Book for the current academic year have been covered in the given assignment

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