Laws of Motion Exe-3E Gravitation Short Answer Type for Class-9 ICSE Concise Physics. There is the solutions of Short Answer type Questions of your latest textbook which is applicable in 2025-26 academic session. Visit official Website CISCE for detail information about ICSE Board Class-9.
Laws of Motion Exe-3E Gravitation Short Answer
(ICSE Class – 9 Physics Concise Selina Publishers)
| Board | ICSE |
| Class | 9th |
| Subject | Physics |
| Writer / Publication | Concise selina Publishers |
| Chapter-3 | Laws of Motion |
| Exe – 3E | Gravitation |
| Topics | Solution of Exe-3(E) Short Answer Type |
| Academic Session | 2025-2026 |
Exe-3E Gravitation Short Answer Type
Ch-3 Laws of Motion Physics Class-9 ICSE Concise
Page 89
Que-1: How does the gravitational force of attraction between two masses depend on the distance between them?
Ans: The gravitational force of attraction between two masses is inversely proportional to the square of distance between them.
Que-2: What is the importance of law of gravitation?
Ans: The gravitational force of attraction is significant to explain the motion of heavenly bodies, e.g. motion of planets around the Sun, motion of the Moon around the Earth etc.
Que-3: What do you understand by the term force due to gravity?
Ans: The force with which the Earth attracts a body towards its centre is called the force due to gravity.
(Laws of Motion Exe-3E Short Class-9 ICSE)
Que-4: Write an expression for the force due to gravity on a body of mass m and explain the meaning of symbols used in it.
Ans: The force due to gravity on a body of mass m kept on the surface of Earth (mass=M and radius=R) is equal to the force of attraction between the Earth and that body. F∈ (Gm x M)/d²
Que-5: How is the acceleration due to gravity on the Earth’s surface related to the mass and radius ?
Ans: Let g be the acceleration due to gravity on the Earth’s surface (mass = M and radius = R).
Then, g=gM/R²
Que-6: Define the terms mass and weight.
Ans: Mass: The mass of a body is the quantity of matter it contains.
Weight: The weight of a body is the force with which the Earth attracts it.
Que-7: Distinguish between mass and weight.
Ans: Mass is a scalar quantity, but weight is a vector quantity. It is the measure of the quantity of matter contained in a body, but weight is the measure of force with which the Earth attracts the body. While Mass of a body is always constant but weight varies from place to place.
Que-8: Explain the meaning of the following statement ‘1 kgf = 9.8 N’.
Ans: 1 kgf = 9.8 N.
One kilogramme force is the force due to gravity on a mass of 1 kilogramme</p
— : End of Laws of Motion Exe-3E Gravitation Short Answer Type Solutions :–
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