Multiple Choice Questions

GRAVITATION

Updated for CBSE 2027
103+ Practice Questions
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Practice Questions with Answers

Total 103 questions available

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Q. 1
What is the relationship described by the Universal Law of Gravitation?
A
F ∝ M × m
B
F ∝ M + m
C
F ∝ M^2
D
F ∝ M / m
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Q. 2
Which statement about a satellite in orbit is wrong?
A
It is a freely falling body
B
It is moving with constant speed
C
It is acted upon by a force directed away from the center of the earth
D
It is an accelerated motion
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Q. 3
If a body weighs 48 N on Earth, what is its weight on the Moon?
A
98 N
B
8 N
C
48 N
D
9.8 N
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Q. 4
What principle explains why a ship made of iron floats while a sheet of the same material sinks?
A
Pascal’s Law
B
Bernoulli’s Principle
C
Archimedes’ Principle
D
Newton’s Third Law
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Q. 5
Who first measured the gravitational constant (G)?
A
Galileo Galilei
B
Henry Cavendish
C
Isaac Newton
D
Albert Einstein
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Q. 6
How does the area affect the pressure exerted by a force?
A
Area has no effect on pressure
B
Pressure decreases with area
C
Pressure increases with area
D
Pressure is equal regardless of area
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Q. 7
Which equation represents the relationship between initial velocity, final velocity, and acceleration?
A
v=u+at
B
s=ut+21​at2
C
v2=u2+2as
D
All of the above
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Q. 8
How does the weight of an object on the Moon compare to its weight on Earth?
A
It is the same
B
It is greater on the Moon
C
It varies randomly
D
It is less on the Moon
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Q. 9
What force keeps the moon in orbit around the Earth?
A
Centrifugal force
B
Frictional force
C
Tension force
D
Gravitational force
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Q. 10
I weigh 60 kg on Earth. If the gravity on the Moon is one-sixth that of the Earth, then my weight on the Moon will be:
A
60 kg
B
10 kg
C
70 kg
D
5 kg
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Q. 11
A body falls freely towards the earth with what type of acceleration?
A
Uniform speed
B
Uniform velocity
C
Uniform acceleration
D
None of these
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Q. 12
What is the main factor determining the magnitude of the buoyant force on an object?
A
Density of the object
B
Color of the object
C
Shape of the object
D
Volume of fluid displaced
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Q. 13
The force of gravitation between two bodies varies with r as:
A
1/r²
B
1/r
C
r²
D
r
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Q. 14
Variation of g with distance r from the center of the Earth (r > Re) is best given by:
A
g ∝ 1/r2
B
g ∝ r
C
g ∝ r^2
D
g ∝ 1/r
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Q. 15
Which of the following is true about mass?
A
It changes with location
B
It is a measure of inertia
C
It depends on gravity
D
Both A and C
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Q. 16
The value of g near the earth's surface is?
A
8.9 m/s
B
9.8 m/s²
C
9.8 m/s
D
8.9 m/s²
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Q. 17
The gravitational force depends on?
A
Their separation
B
Gravitational constant
C
Product of their masses
D
All of these
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Q. 18
A body is weighed at the poles and then at the equator. Where is it heavier?
A
At the equator
B
At the poles
C
Equal at both locations
D
Depends upon the object
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Q. 19
When an object is thrown up, the force of gravity?
A
Increases as it moves up
B
Acts in the opposite direction
C
Remains constant
D
Acts in the direction of motion
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Q. 20
Speed of Jupiter if mass is 1.9 × 10²⁷ kg, sun mass is 1.99 × 10³⁸ kg, distance is 7.8 × 10¹¹ m?
A
1.304 × 10⁴ m/s
B
13.04 × 10⁴ m/s
C
1.304 × 10⁶ m/s
D
1.304 × 10² m/s
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Q. 21
What is the SI unit of weight?
A
Newton (N)
B
Meter (m)
C
Kilogram (kg)
D
Joule (J)
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Q. 22
If an object has a density greater than that of the fluid, what will happen when it is placed in the fluid?
A
It will stay suspended
B
It will evaporate
C
It will float
D
It will sink
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Q. 23
The value of ‘g’ is minimum:
A
In mines
B
At equator of Earth
C
At poles of Earth
D
On hills
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Q. 24
What does Archimedes’ Principle state about the buoyant force on an immersed object?
A
It is equal to the weight of the fluid displaced by the object
B
It is equal to the volume of the object
C
It is directly proportional to the density of the object
D
It is equal to the weight of the object
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Q. 25
Which of the following is not related to gravitational law?
A
Thunder and lightning
B
Motion of planets around the Sun
C
Occurrence of tides
D
Rainfall and snowfall
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Q. 26
What determines whether an object sinks or floats in a fluid?
A
Its volume
B
Its density compared to the fluid
C
Its color
D
Its shape
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Q. 27
The mass of a body on Earth is 60 kg; what is its mass on the Moon?
A
Zero
B
10 kg
C
120 kg
D
60 kg
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Q. 28
What is Archimedes' Principle primarily used for in engineering?
A
Designing ships and submarines
B
Designing buildings
C
Designing roads
D
Designing electronics
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Q. 29
What does the equation W=m×g represent?
A
The force of an object
B
The weight of an object
C
The distance of an object
D
The mass of an object
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Q. 30
The force of gravitation exists?
A
At the surface of the moon only
B
Everywhere in the universe
C
At the surface of the earth only
D
Inside the earth only
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Q. 31
A missile launched below escape velocity has what kind of energy?
A
Zero
B
Positive
C
Negative
D
May be positive or negative
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Q. 32
Which statement is correct?
A
All bodies repel each other
B
Earth does not behave like a magnet
C
Acceleration due to gravity is 8.9 m/s²
D
All bodies fall at the same rate in vacuum
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Q. 33
The tidal waves in the sea are primarily due to:
A
Atmospheric effect of Earth
B
Gravitational effect of Mars on Earth
C
Gravitational effect of Moon on Earth
D
None of these
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Q. 34
How does pressure in a confined fluid behave?
A
It decreases with depth
B
It is transmitted in all directions
C
It acts only downward
D
It only acts on the surface
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Q. 35
Why does the cork float while the nail sinks?
A
Nail has more volume
B
Cork is less dense than water
C
Cork has less surface area
D
Cork is heavier
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Q. 36
Which of the following objects will sink in water?
A
A wooden block
B
A plastic bottle
C
An iron nail
D
A cork
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Q. 37
What is the SI unit of pressure?
A
Pascal (Pa)
B
Meter (m)
C
Joule (J)
D
Newton (N)
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Q. 38
What upward force does a body experience when immersed in a fluid?
A
Gravitational force
B
Buoyant force
C
Friction
D
Tension
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Q. 39
In which scenario would you expect the pressure exerted by a block of wood to be greatest?
A
When the block is on a side with the largest area
B
When the block is on a side with the smallest area
C
When the block is suspended in the air
D
When the block is in a container filled with water
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Q. 40
What is the SI unit of G?
A
N²–m²/kg
B
N–m²/kg²
C
N–m/kg
D
N–m²/kg
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Q. 41
Four planets A, B, C, and D made up of the same material have radii of r/2, r, 2r, and 4r. The order of the planets in increasing order of acceleration due to gravity is:
A
A, C, B, D
B
B, C, D, A
C
A, B, C, D
D
D, C, B, A
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Q. 42
Why does a bottle feel lighter when submerged in water?
A
Water reduces its volume
B
Buoyant force acts upwards
C
It is filled with air
D
It weighs less in water
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Q. 43
The force of gravitation between two bodies varies with r as:
A
1/r
B
r
C
r²
D
1/r²
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Q. 44
According to Archimedes' Principle, what does the buoyant force equal?
A
Weight of the fluid
B
Weight of the body
C
Weight of the container
D
Weight of the fluid displaced
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Q. 45
Why does the Earth not move towards a falling apple?
A
The apple's mass is too large
B
The gravitational force is negligible
C
The Earth's mass is too large
D
The apple is not falling
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Q. 46
Why do vehicles like trucks have wider tires?
A
To increase thrust
B
To improve stability
C
To enhance speed
D
To decrease pressure on the ground
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Q. 47
A geostationary satellite?
A
Moves faster than a near earth satellite
B
Is stationary in space
C
Revolves about the polar axis
D
Has a time period less than a near earth satellite
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Q. 48
Weight of an object is highest at:
A
Center of Earth
B
Poles
C
Equator
D
Above the Earth’s surface
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Q. 49
Universal law of gravitation does not explain:
A
Motion of planets around the Sun
B
Tides on Earth due to the Moon
C
Motion of the Moon around Earth
D
Motion of electrons in an atom
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Q. 50
What happens to an object's weight if its mass is doubled?
A
It halves
B
It remains the same
C
It triples
D
It doubles
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Q. 51
An object weighs 10 N on the surface of the Earth. What should be its weight on the Moon?
A
2.20 N
B
16.7 N
C
1.67 N
D
4.18 N
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Q. 52
What happens to an object's weight as it moves from Earth to the Moon?
A
It becomes zero
B
It decreases
C
It increases
D
It remains the same
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Q. 53
How does the pressure exerted by a nail compare to that of a flat surface?
A
It increases
B
It fluctuates
C
It remains the same
D
It decreases
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Q. 54
What is the mass of a body on the moon if its mass on Earth is M?
A
M + 6
B
M
C
M/6
D
Zero
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Q. 55
If the distance between two masses is doubled, what happens to the force?
A
1/4 times
B
2 times
C
1/2 times
D
4 times
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Q. 56
What causes the decrease in the elongation of the string when a stone is lowered into water?
A
The density of the water decreases
B
The stone gains weight in water
C
The buoyant force acting on the stone increases
D
The water level rises, affecting the reading
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Q. 57
Acceleration due to gravity on the surface of the Moon is 1/6th of its value on the surface of the Earth because they have different:
A
Mass
B
Density
C
Radius
D
All of these
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Q. 58
In which situation would an object not experience buoyancy?
A
When it is fully immersed in water
B
When it is in air
C
When it is sinking
D
When it is floating on the surface
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Q. 59
What do we call the upward force exerted by a fluid on an immersed object?
A
Buoyant force
B
Thrust
C
Weight
D
Pressure
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Q. 60
According to Galileo's experiments, how do objects of different masses fall?
A
Heavier objects fall faster
B
Lighter objects fall slower
C
All objects fall at the same rate
D
It depends on their shape
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Q. 61
Gravitational force does not depend on:
A
The gravitational constant
B
Charge on two bodies
C
Masses of two bodies
D
Separation between two bodies
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Q. 62
Where is the maximum weight of a body?
A
On the surface of the earth
B
At the center of the earth
C
Above the surface of the earth
D
Inside the earth
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Q. 63
Gravitational force acting on 1 kg?
A
9.8 N
B
1/9.8 N
C
980 N
D
None of these
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Q. 64
If the mass of Earth is increased by 25% with no change in size, what happens to its gravitational acceleration?
A
Decreases by 25%
B
Remains constant
C
May decrease or remain constant
D
Increases by 25%
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Q. 65
What occurs once a stone is fully immersed in water?
A
It sinks deeper
B
It floats
C
It gets heavier
D
No further decrease in string elongation
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Q. 66
The weight of an object:
A
Is the same as the mass
B
Is the quantity of matter it contains
C
Is the force with which it is attracted to the Earth
D
Refers to its inertia
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Q. 67
The SI unit of G is:
A
N kg⁻²
B
N m
C
N m s⁻¹
D
N kg⁻² m²
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Q. 68
What does 'g' represent in the context of free fall?
A
Gravitational force
B
Acceleration due to gravity
C
Mass of an object
D
Weight of an object
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Q. 69
Why does a plastic bottle float in water when it is closed and empty?
A
The plastic bottle has a high buoyant force
B
The plastic bottle displaces more water than its weight
C
The plastic bottle is lighter than water
D
The plastic bottle is denser than water
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Q. 70
What is the relationship between thrust and pressure?
A
Pressure = Thrust × Area
B
Pressure = Thrust / Area
C
Pressure = Force × Area
D
Pressure = Area / Thrust
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Q. 71
What happens to the gravitational force as the distance between two objects increases?
A
It becomes zero
B
It decreases
C
It increases
D
It remains constant
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Q. 72
A ball thrown vertically upwards with a velocity ‘u’ will fall back with what velocity?
A
Greater than ‘u’
B
Equal to ‘u’
C
Greater than or equal to ‘u’
D
Less than ‘u’
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Q. 73
Acceleration due to gravity?
A
Is greater on the moon
B
Varies with latitude
C
Has the same value everywhere in space
D
Has the same value everywhere on the Earth
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Q. 74
What principle explains why objects feel lighter in water?
A
Pascal's Law
B
Newton's Laws
C
Archimedes' Principle
D
Bernoulli's Principle
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Q. 75
How does the weight of an object change with location?
A
It increases everywhere
B
It decreases on the moon
C
It depends on mass only
D
It remains constant
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Q. 76
What is the primary reason for using wide foundations in buildings?
A
To reduce the weight of the building
B
To increase the pressure exerted on the ground
C
To distribute the weight of the building over a larger area
D
To make the building aesthetically pleasing
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Q. 77
Which instrument uses Archimedes' Principle to determine the density of liquids?
A
Hydrometer
B
Barometer
C
Lactometer
D
Thermometer
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Q. 78
What is the effect of buoyancy on an object submerged in a fluid?
A
It has no effect
B
It pulls the object down
C
It pushes the object up
D
It changes its mass
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Q. 79
1 kg weight is equal to?
A
9.8 N
B
980 N
C
98 N
D
None of these
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Q. 80
The acceleration due to gravity at the poles is:
A
Zero
B
Less than at the equator
C
Same as at the equator
D
More than at the equator
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Q. 81
What happens to the elongation of a string when a stone is lowered into water?
A
It fluctuates
B
It increases
C
It remains the same
D
It decreases
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Q. 82
What is the acceleration due to gravity denoted by?
A
a
B
g
C
m
D
F
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Q. 83
If a rock is brought from the surface of the moon, what will change?
A
Its mass will change
B
Its weight will change
C
Both mass and weight will change
D
Its mass and weight remain the same
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Q. 84
What is the SI unit of the gravitational constant (G)?
A
J/kg
B
kg m/s²
C
N m²/kg²
D
N/kg
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Q. 85
What does Pascal’s Law state about the pressure in confined fluids?
A
Pressure is not transmitted through fluids
B
Pressure varies according to the density of the fluid
C
Pressure is transmitted undiminished in all directions
D
Pressure is reduced by the fluid’s temperature
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Q. 86
The value of G does not depend on?
A
Nature of the bodies
B
Size of the bodies
C
Mass of the bodies
D
All of these
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Q. 87
What happens to the buoyant force when the density of the fluid increases?
A
It becomes zero
B
It increases
C
It decreases
D
It remains the same
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Q. 88
Which situation demonstrates the concept of thrust?
A
Lifting a book off a table
B
Pressing a thumbtack into a bulletin board
C
Throwing a ball
D
Standing on solid ground
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Q. 89
Why does the Earth not move towards an apple when it falls?
A
Apple experiences greater force
B
Only apple exerts force on Earth
C
Only Earth exerts force on apple
D
Acceleration of Earth is negligible
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Q. 90
What is the SI unit of g?
A
m/s²
B
m/s
C
s/m²
D
m²/s
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Q. 91
The magnitude of gravitational force between the Earth and a 10 kg body is:
A
90 N
B
100 N
C
9.8 N
D
98 N
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Q. 92
In a vacuum, what would happen if a feather and a hammer are dropped simultaneously?
A
The hammer falls faster
B
The feather falls slower
C
They fall at the same rate
D
They do not fall
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Q. 93
Why does an iron nail sink in water while a cork floats, despite both having the same mass?
A
The nail has a greater volume of displaced water compared to the cork
B
The cork has a higher density than the nail
C
The nail displaces more water than the cork
D
The density of the nail is greater than that of the water
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Q. 94
SI unit of weight?
A
kg wt
B
N
C
g wt
D
None of these
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Q. 95
What is thrust in the context of forces?
A
Any upward force
B
Force acting perpendicular to a surface
C
Force exerted by gravity
D
Force acting in any direction
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Q. 96
Why does a block of wood exert different pressures on a table depending on its orientation?
A
The density of the wood changes
B
The gravitational pull varies
C
The area of contact changes
D
The weight of the block changes
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Q. 97
When a body is fully immersed in a fluid, what happens to the buoyant force acting on it?
A
It decreases
B
It increases
C
It becomes zero
D
It remains the same
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Q. 98
What is the primary reason a ship made of steel can float?
A
It weighs less than water
B
Its density is less than water
C
It has a large surface area
D
It is filled with air
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Q. 99
What is weight?
A
Is a vector quantity
B
Of a body in space is maximum
C
Increases when bodies go up
D
None of these
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Q. 100
Density of oil with mass 11040 kg and volume 12 m³?
A
920 kg/m³
B
92 kg/m³
C
9.2 kg/m³
D
1.08 × 10⁻³ kg/m³
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Q. 101
The wrong option about gravitational force among the following is:
A
Always attractive by nature
B
Gravitational force acts on the line joining the masses
C
Does not form action-reaction pair
D
Independent of the other masses
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Q. 102
According to Newton, what does the falling apple illustrate about gravitational force?
A
It only affects large objects
B
It is negligible for small objects
C
It attracts all objects equally
D
It depends on distance
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Q. 103
What is the mass of a body whose weight is 59 N? Take g = 9.8 m/s²
A
50 kg
B
5 kg
C
6 kg
D
9 kg
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