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Gravitation Solved Questions | Gravitation Objective Type Questions & Answers

Questions
21 Gravitational force of attraction between satellite and Earth provides necessary
A centrifugal force
B centripetal force
C dynamic force
D translatory force

Answer: centripetal force
22 Acceleration due to gravity on moon is
A 9.9 ms-2
B 9.5 ms-2
C 6.1 ms-2
D 1.6 ms-2

Answer: 1.6 ms-2
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23 According to Newton's law of universal gravitation, any two particles of finite mass attract one another with a force which is
A Inversely proportional to the product of their masses and directly proportional to the square of their distance apart
B Inversely proportional to the product of their masses and directly proportional to their distance apart
C Directly proportional to the product of their masses and inversely proportional to their distance apart
D Directly proportional to the product of their masses and inversely proportional to the square of their distance apart

Answer: Directly proportional to the product of their masses and inversely proportional to the square of their distance apart
24 Point where entire weight of an object acts is
A edge
B center of gravity
C central point
D can be anywhere in body

Answer: center of gravity
25 In SI units , value of gravitational constant(G) is
A 6.673 & times; 10-11
B 8.673 & times; 105
C 6.673 & times; 105
D 4.673 & times; 105

Answer: 6.673 & times; 10-11
26 Gravitational pull of Earth acting on body whether body is in contact with Earth or not, such force is known as
A force of inertia
B force of limiting friction
C force of inertia
D field force

Answer: field force
27 If speed of rotation of earth increases then what would be the value of weight of a body?
A Weight of a body will increases
B Weight of a body will decreases
C Weight of a body remain constant
D Can not be answered

Answer: Weight of a body will decreases
28 The value of gravitational acceleration is –
A increases as height increase form the earth
B decreases as height increase from the earth
C remains constant
D None of the above

Answer: Increases as height increase from the earth
29 What is the value of gravitational acceleration on Earth?
A 9.8 m-s2
B 9.8 m/s2
C 8.9 m-s2
D 8.9 m/s2

Answer: 9.8 m/s2
30 What is the unit of Universal Gravitational Constant in SI unit?
A N-m-Kg
B N/m-Kg
C N/m2-Kg
D attractive at large distances but repulsive at small distances

Answer: N-m/Kg2
31 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

Answer: Greater than 1020N
32 The ball is thrown up, the value of ‘g’ will be
A Zero
B positive
C negative
D negligible

Answer: negative
33 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

Answer: 9.8N
34 The value of ‘g’
A Increases as we go above the earth’s surface
B Decreases as we go to the centre of the earth
C Remains constant
D Is more at equator and less at poles

Answer: Decreases as we go to the centre of the earth
35 Newton’s law of gravitation applies to
A Small bodies only
B Plants only
C For solar system
D All bodies irrespective of their size

Answer: All bodies irrespective of their size
36 In case of free fall the gravitational acceleration on a spherical object depends on__
A The mass of the object
B The radius of the object
C The density of the object
D None of the above

Answer: None of the above
37 Gravitational mass is proportional to gravitational
A Field
B Force
C Intensity
D All of these

Answer: All of these
38 If the distance between two masses is doubled, the gravitational attraction between them
A Is doubled
B Becomes four times
C Is reduced to half
D Is reduced to a quarter

Answer: Is reduced to a quarter
39 A satellite of the earth is revolving in a circular orbit with a uniform speed v. If the gravitational force suddenly disappears, the satellite will
A Continue to move with velocity v along the original orbit
B Move with a velocity v, tangentially to the original orbit
C Fall down with increasing velocity
D Ultimately come to rest somewhere on the original orbit

Answer: Move with a velocity v, tangentially to the original orbit
40 If there were a smaller gravitational effect, which of the following forces do you think would alter in some respect
A Viscous forces
B Archimedes uplift
C Electrostatic force
D None of the above

Answer: Archimedes uplift

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