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Free download in PDF Gravitation Objective Type Questions & Answers for competitive exams. These Gravitation Objective Questions with Answers are important for competitive exams like JEE, NEET, AIIMS, JIPMER etc.
(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
(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
(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
(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
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
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
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
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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