NCERT Solutions for Class 9 Science Chapter 10: Gravitation

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The NCERT Solutions for Class 9 Science Chapter 10 Gravitation are provided in this article. Some of the important topics of Class 9 Science Chapter 10 Gravitation include:

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NCERT Solutions for Class 9 Science Chapter 10

NCERT Solutions class 9 science chapter 10

Important Topics for Class 9 Science Chapter 10 Gravitation

Gravitation is the universal force of attraction that is seen to act between all matter. An object when thrown upwards, reaches a certain height and then falls downwards is the perfect example of seeing how gravity works.

Universal Law of Gravitation

The universal law of gravitation claims that every particle of matter found in the universe potentially attracts other particles with a force which is directly proportional to the product of the masses and inversely proportional to the square of the distance between them.

The Universal Law of gravitation can be expressed as:
F = GM¹M²/R²

Wherein,

G = universal gravitational constant (Nm²/kg²)
R = radius of the heavier body (km)
M = mass of the heavier body (Kg)

Buoyancy

Buoyant Force can be defined as the force via which every object suspended in a fluid medium is visibly seen to be buoyed in an upwards direction.

Buoyant Force is based on several factors, like:

Fluid density
The object volume or displaced fluid
The acceleration due to gravity in the specific area

Archimedes’ Principle

Archimedes’ Principle claims that a submerged object in water, either partially or fully, can potentially experience an upward buoyant force equivalent to the weight of water which is displaced by the object.

Formula of Archimedes’ Principle: F_b = ρ x g x V

Here,

F_b is the buoyant force
ρ is the density of the fluid
V is the submerged volume
g is the acceleration due to gravity

Check Out:

Chapter Related Links
Gravitational Acceleration Formula	Gravitational Constant	Gravitational Force Formula
Mass and Weight	Thrust and Pressure	Relative Density
Difference Between Mass & Weight	Difference between Gravitation and Gravity	Gravity Waves

Also Read:

Important Science Study Guides
Difference between in physics	Named Reactions	Difference between in biology
Difference between in chemistry	Periodic Table	Physics Constants

CBSE X Related Questions

1.
Sex is determined by different factors in various species. However, in human beings, it is determined genetically. Which amongst the following option(s) is/are correct for human beings ?
Gamete carrying X chromosome from female parent.
Gamete carrying X chromosome from male parent.
Gamete carrying Y chromosome from male parent.
- (ii) and (iii)
- (i) only
- (i) and (iii)
- (iii) only
View Solution
2.
(i) \( \text{AgNO}_3 + \text{NaCl} \rightarrow \text{NaNO}_3 + \text{AgCl} \)
(ii) \( \text{K}_2\text{SO}_4 + \text{BaCl}_2 \rightarrow \text{BaSO}_4 + 2\text{KCl} \)
Which of the following options clearly describes both the reactions?
- (i) is double displacement, (ii) is displacement reaction.
- Both, (i) and (ii) are displacement reactions and precipitation reactions.
- Both, (i) and (ii) are double displacement reactions and precipitation reactions.
- (i) is displacement, (ii) is double displacement reaction.
View Solution
3.
Assertion : Bacteria produced as a result of asexual reproduction would be similar. Reason (R): There would be only minor differences between the bacteria generated due to small inaccuracies in DNA replication.
- Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
- Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
- Assertion (A) is true, but Reason (R) is false.
- Assertion (A) is false, but Reason (R) is true.
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4.
The reasons for excessive generation of wastes are:
(i) Use and throw policy.
(ii) Increased availability of packaged food.
(iii) Increased construction wastes.
(iv) Non-sorting of dry and wet wastes
- (i), (iii) and (iv)
- (i), (ii) and (iii)
- (i), (ii), (iii) and (iv)
- (ii), (iii) and (iv)
View Solution
5.
The natural sources of oxalic acid, lactic acid and methanoic acid respectively are:
- tomato, curd, ant-sting
- tomato, orange, nettle-sting
- orange, milk, ant-sting
- orange, sour milk, nettle-sting
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6.
Which of the following group is not 'biodegradable'?
- Vegetable peels, dead leaves, paper
- Cow dung, leather bag, water
- Polythene bag, rubber band, ball pen
- Paper, fruits, bones
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