# Class 9 Science Chapter 10 Gravitation MCQ Questions with Answer

Gravitation Class 9 MCQ is one of the best strategies to prepare for the CBSE Class 9 Board exam. If you want to complete a grasp concept or work on one’s score, there is no method except constant practice. Students can improve their speed and accuracy by doing more Gravitation class 9 MCQ which will help them all through their board test.

## Gravitation Class 9 MCQ Questions with Answer

Class 9 Science MCQ with answers are given here to Chapter 10 Gravitation. These MCQs are based on the latest CBSE board syllabus and relate to the latest Class 9 Science syllabus. By Solving these Class 9 MCQs, you will be able to analyze all of the concepts quickly in the Chapter and get ready for the Class 9 Annual exam.

Learn Gravitation Class 9 MCQ with answers pdf free download according to the latest CBSE and NCERT syllabus. Students should prepare for the examination by solving CBSE Class 9 Gravitation MCQ with answers given below.

Question 1: If the distance between objects increases, then the gravitational force between the objects will:
(a) remain same
(b) none of these
(c) decrease
(d) Increase

C

Question 2: The relation between the weight of an object on the moon (WM) and on the earth (WE)
(a) WM =6 WE
(b) We = 1/6WM
(c) WM= We
(d) WM =1/6 (We)

D

Question 3 : The weight of an object is:
(a) lesser on earth and greater on moon
(b) Equal on both earth and moon
(c) Greater on earth and lesser on moon
(d) none of these

C

Question 4: The mass of an object is
(a) The amount of matter contained in the object, independent of where that object is found
(b) the force of gravity on that object located at a particular point in space
(c) dependent on whether the object is on the Earth or elsewhere.
(d) divided by the Earth acceleration due to gravity to equal force.

A

Question 5: Which of the following was NOT a contribution of Newtons to science?
(a) the first good experimental measure of G, the gravitational constant of proportionality
(b) the law of universal gravitation
(c) F = ma
(d) explanations of optical phenomena

A

Question 6: The expression for finding the gravitational force of attraction between any two bodies is
(a) F= G m1m2/r3
(b) F= G m1m2/r
(c) F= Gm1 m2/r2
(d) F = Gm1/r

C

Question 7: The force which keeps the body to move in circular motion when accelerated is
(a) Force of gravitation
(b) Magnetic force
(c) Centripetal force
(d) Electrostatic force

C

Question 8: The upward force exerted by the liquid displaced by the body when it is placed inside the liquid is called
(a) Buoyant force
(b) Gravitational force
(c) Centripetal force
(d) Force of gravitation

A

Question 9: SI Unit of pressure is
(a) Pascal
(b) Newton
(c) m/s
(d) Dyne

A

Question 10: The force acting on an object perpendicular to the surface is called
(a) weight
(b) Pressure
(c) Weight
(d) thrust

D

Question 11: The value of acceleration due to gravity at the highest point of the motion of the body when a body is projected upwards
(a) 9.8 m/s2 downwards
(b) 0 m/s2
(c) 6 m/s2
(d) 9.8 m/s2 upwards

A

Question 12: The value of acceleration due to gravity of the surface of the earth is
(a) 9.8 m/s2
(b) 6 m/s2
(c) 8 m/s2
(d) 4.9 m/s2

A

Question 13. A body of mass 1kg is attracted by the earth with a force which is equal to
(a) 9.8N
(b) 6.67x 1011
(c) 1 N
(d) 9.8m/s

A

Question 14 : The time of ascent when measured from the point of projection of a body projected upwards , the
(a) Time of ascent=Time of descent
(b) Time of ascent > Time of descent
(c) Time of ascent < Time of descent
(d) All of the above

A

Question 15: Weight of an object on the surface of the moon is
(a) 1/6 that on the surface of the earth
(b) 1/5 th that on the surface of the earth
(c) 1/3 that on the surface of the earth
(d) 1/2 that on the surface of the earth

A

Question 16 : The value of acceleration due to gravity at the poles
(a) zero
(b) Same as at the equator
(c) Is less than at the equator
(d) Is more than at the equator

D

Question 17 . A girl stands on a box having 60 cm length, 40 cm breadth and 20 cm width in three ways. In which of the following cases, pressure exerted by the box will be
(a) maximum when length and breadth form the base
(b) maximum when breadth and width form the base
(c) maximum when width and length form the base
(d) the same in all the above three cases

B

Question 18. The Earth attracts the moon with a gravitational force of 1020N. The moon attracts the earth with a gravitational force of
(a) Less than 1020N
(b) 1020N
(c) Greater than 1020N
(d) 10-20N

C

Question 19 . The SI unit of pressure is
(a) Nm2
(b) N/m
(c) N/m2
(d) N2/m2

C

Question 20 . Two objects of different masses falling freely near the surface of the moon would
(a) have same velocities at any instant
(b) have different acceleration
(c) experience forces of same magnitude
(d) undergo a change in their inertia

A

Question 21 . Choose the correct unit for the relative density among the following:
(a) kg/cm
(b) unitless
(c) kg/cm
(d) kg/m3

B

Question 22 . The gravitational force causes
(a) Tides
(b) Motion of moon
(c) None of them
(d) Both a n b

D

Question 23. A rectangular block of wood of dimensions 40cm x 20cm x 10cm is kept on a table top. The pressure is greatest when it is rested on
(a) equal for all cases
(b) 20cm x 10 cm
(c) 40cm x 10cm
(d) 40cm x 20cm

B

Question 24. When a body is weighed in a liquid, the loss in weight is equal to
(a) weight of liquid displaced by the body
(b) weight of water displaced by the body
(c) weight of body in air
(d) half the weight of body in air

A

Question 25. The gravitational force between two bodies does not depend on
(a) their separation
(b) their masses
(c) the product of their masses
(d) the medium between the two bodies

D

Question 26 . An apple falls from a tree because of the gravitational attraction between the earth and the apple. If F1 is the magnitude of the force exerted by the earth on the apple and F2 is the magnitude of the force exerted by the apple on the earth, then
(a) F1 is very much greater than F2
(b) F2 is very much greater than F1
(c) F1 and F2 are equal
(d) F1 is only a little greater than F2

C

Question 27. In the relation F = GM mld2, the quantity G
(a) depends on the value ofg 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

D

Question 28 . The earth and the moon are attracted to each other by gravitational force. The earth attracts the moon with a force that is:
(a) More than that exerted by the moon
(b) Same as that exerted by the moon
(c) Less than that exerted by the moon
(d) Not related to that exerted by the moon

B

Question 29. The walls of a dam at the bottom are made thick because
(a) it looks attractive
(b) it is conventional
(c) it is convenient
(d) water exerts large pressure at the bottom

D

Question 30. A mass weighing W can float if the upthrust U is related as
(a) U > W
(b) U = W
(c) U < W
(d) U ≥ W

A

Question 31. Two objects of different masses falling freely near the surface of moon would:
(a) Have different accelerations
(b) Undergo a change in their inertia
(c) Have same velocities at any instant
(d) Experience forces of same magnitude

D

Whoever needs to take the CBSE Class 9 Board Exam should look at this MCQ. To the Students who will show up in CBSE Class 9 Science Board Exams, It is suggested to practice more and more questions. Aside from the sample paper you more likely had solved. These Gravitation Class 9 MCQ are ready by the subject specialists themselves.

Question 32. The atmosphere is held to the Earth by
(a) gravity
(b) wind
(c) clouds
(d) Earth’s magnetic field

A

Question 33. 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 times
(b) 4 times
(c) 1/2 times
(d) Unchanged

B

Question 34. Acceleration due to gravity on the surface of the moon is 1/6th of its value on the surface of the earth as they have different______.
(a) mass
(b) density
(d) All of the above

D

Question 35. An object weighing 5 N in air, weighs 4.5 N a liquid. The buoyant force experienced by the object is
(a) (5 + 4.5) N
(b) 4.5/5 N
(c) 5/4.5 N
(d) 0.5 N

D

Question 36. Universal law of gravitation does not explain
(a) the tides on earth due to the moon
(b) the motion of electrons in an atom
(c) the motion of planets around the Sun
(d) the motion of the moon around the earth

B

Question 37 .The unit of G in the S.I. system is:
(a) Newton m2/kg2
(b) Newton m2 kg2
(c) Newton m kg
(d) Newton m2/kg

A

Question 38 . The weight of a body is 120 N on the earth. If it is taken to the moon, its weight will be about
(a) 120 N
(b) 60 N
(c) 20 N
(d) 720 N

C

Question 39. Newton’s law of gravitation is valid
(a) on the earth only
(b) on the moon only
(c) in the laboratory only
(d) everywhere

D

Question 40. Which of the following statements is true?
(a) g is same at all places on the surface of earth.
(b) g has its maximum value at the equator.
(c) g is less at the earth’s surface than at a height above it or a depth below it.
(d) g is greater at the poles than at the equator

D

Question 41 . The atmosphere is held to the earth by:
(a) gravity
(b) wind
(c) clouds
(d) earth’s magnetic field

A

Question 42 . The mass of a body is measured to be 12 kg on the earth. If it is taken to the moon, its mass will be
(a) 12 Kgcorrect
(b) 6 Kg
(c) 2 Kg
(d) 72 Kg

A

Question 43. An apple and a stone dropped from certain height accelerates
(a) equally
(b) differently
(c) depending on density
(d) depends on the position of the sun

A

Question 44. An astronaut in the orbit in a spacecraft feels weightlessness
(a) due to the absence of gravity inside
(b) due to the fact that spacecraft has no energy
(c) because acceleration in the orbit is equal to acceleration of gravity outside
(d) there is no gravity outside

C

Question 45. A coin and a feather are dropped together in a vacuum.
(a) The coin will reach the ground first.
(b) The feather will reach the ground first.
(c) Both will reach the ground together.correct
(d) The feather will not fall down.

C

Question 46 . The mass of the earth is:
(a) 6.4 × 1024
(b) 6 × 1010 kg
(c) 6 × 1024 kg
(d) 6 × 1019 kg

C

Question 47. Which of the following statements is/are correct?
1. Mass of an object is the measure of its inertia.
2. Heavier the object smaller is the inertia.
3. The mass of an object is variable.
(a) Only 1
(b) 1 and 3
(c) 2 and 3
(d) 1 and 2

A

Question 48. At which of the following locations is the value of g largest?
(a) On top of the Mount Everest
(b) On top of Qutub Minar
(c) At a place on the equator
(d) A camp site in Antarctica

D

Question 49. The weight of a body is 120 N on the earth. If it is taken to the moon, its weight will be about
(a) 120 Nwrong
(b) 60 N
(c) 20 Ncorrect
(d) 720 N

C

Question 50. What happens to the acceleration due to gravity with the increase in altitude from the surface of the earth?
(a) Increases
(b) Decreases
(c) First decreases and then increases
(d) Remains same

B

Question 51. If more force is required to bring a body into a unit acceleration, the body has
(a) less mass
(b) zero mass
(c) more mass
(d) mass is independent of force

C

Question 52. Newton’s law of gravitation is valid
(a) in laboratory
(b) only on the earth
(c) only in our solar system
(d) everywhere

D

Question 53. Weight of an object is highest at
(a) Center of earth
(b) Poles
(c) Above the earth’s surface
(d) Equator

B

Question 54. The value of acceleration due to gravity at the Mount
Everest is
(a) g
(b) > g
(c) < g
(d) zero

C

Question 55. Two objects of different masses falling freely near the surface of moon would
(a) experience forces of different magnitudes
(b) have different accelerations
(c) have same velocities of any instant
(d) undergo a change in their inertia

C

Question 56. When a body is thrown up, the force of gravity is
(a) in the upward direction
(b) in the downward direction
(c) zero
(d) in the horizontal direction

B

Question 57 . An object is put in three liquids having different densities, one by one. The object floats with 1/9, 2/11 and 3/7 parts of its volume outside the surface of liquids of densities d1, d2 and d3 respectively. Which of the following is the correct order of the densities of three liquids?
(a) d1 > d2 > d3
(b) d2 > d3 > d1
(c) d1 < d2 < d3
(d) d3 > d2 > d1

C

Question 58. The constant G
(a) is a very small quantity
(b) is a force
(c) is the same as g
(d) decrease with increasing altitude

A

Question 59. When an object is thrown upward, the force of gravity is
(a) opposite to the direction of motion
(b) in the same direction as the direction of motion
(c) becomes zero at the highest point
(d) increases as it rises up

A

Question 60. The mass of moon is about 0.012 times that of the earth and its diameter is about 0.25 times that of earth. The value of G on the moon will be:
(a) Same as that on the earth
(b) About one-fifth of that on the earth
(c) About one-sixth of that on the earth
(d) About one-fourth of that on the earth

A

Question 61. A ball weighing 4 kg of density 4000 kgm-3 is completely immersed in water of density103 kgm-3. What will be the buoyant force acting on it?
(a) 100 N
(b) 10 N
(c) 1600N
(d) 16 N

B

Question 62. The acceleration due to gravity
(a) has the same value everywhere in space
(b) has the same value everywhere on the earth
(c) varies with the latitude on the earth
(d) is greater on the moon due to its smaller diameter

C

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