Class 9 Gravitation MCQ Online Test. We covered all the Class 9 Gravitation MCQ Online Test in this post for free so that you can practice well for the exam.
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MCQ on Gravitation for Students
In uniform circular motion the magnitude of acceleration is equal to
1) the ratio of magnitude of change in velocity per one revolution and time period
2) the ratio of change in velocity per one revolution and time period
3) the ratio of velocity per one revolution and time period
4) none of these
Option 1 – the ratio of magnitude of change in velocity per one revolution and time period
In uniform circular motion the angle between the change in velocity and velocity vector
1) approaches to 90⁰
2) approaches to 180⁰
3) approaches to 0⁰
4) approaches to 60⁰
Option 1 – approaches to 90⁰
In uniform circular motion
1) the velocity is directed tangentially to the path
2) the acceleration is directed along the radius towards the centre of the circle
3) the velocity and acceleration both are directed along the radius towards the centre of the circle
4) both 1 and 2
Option 4 – both 1 and 2
In uniform circular motion the particle is moving with constant speed v in a circular path radius R, then
1) the velocity vectors drawn to the body at successive time intervals change their direction continuously from one point to another point.
2) Upon transferring the tails of each velocity vector they coincide at a single point without changing their directions
3) The directed line joining two successive velocity vectors represents the change in velocity
4) all the above
Option 4 – all the above
In uniform circular motion the change in velocity during the course of a complete revolution is equal to
1) the sum of the magnitudes of the changes in velocity during a complete revolution
2) the difference of the magnitudes of the changes in velocity during a complete revolution
3) the product of the magnitudes of the changes in velocity during a complete revolution
4) none of these
Option 1 – the sum of the magnitudes of the changes in velocity during a complete revolution
The acceleration which can change only the direction of velocity of a body is called
1) Acceleration due to gravity
2) Uniform acceleration
3) Centripetal acceleration
4) Centrifugal acceleration
Option 3 – Centripetal acceleration
The distance between the Earth and the Moon is
1) 3,84,400 km
2) 3,84,400 cm
3) 84,000 Km
4) 86,600 Km
Option 1 – 3,84,400 km
The gravitational force between two bodies is
1) always attractive
2) always repulsive
3) some times attractive
4) neither attractive nor repulsive
Option 1 – always attractive
Newton generalized that
1) the force of gravitation acts on all bodies in the universe
2) the force of gravitation acts on some bodies in the universe
3) the force of gravitation cannot valid to act in vacuum
4) the force of gravitation depends on medium between the bodies
Option 1 – the force of gravitation acts on all bodies in the universe
In uniform circular motion the net force acts towards the centre
1) will change only the direction of velocity of the body
2) produces an acceleration continuously towards the centre
3) will change only the magnitude of velocity of the body
4) both a and d
Option 4 – both a and d
The gravitational force between the two masses is
1) directly proportional to product of their masses
2) inversely proportional to square of the distance between them
3) directly proportional to the distance between them
4) both a and b
Option 4 – both a and b
The examples of non uniform accelerated motion.
1) The motion of earth around the sun
2) The motion of the moon around the earth
3) The motion of apple falling freely on to the ground
4) Both a and b
Option 4 – both a and b
Newton developed the Idea of ( Class 9 Gravitation MCQ Online Test )
1) gravitation between any two masses
2) gravitation between some masses
3) magnetism between any two masses
4) non of these
Option 1 – gravitation between any two masses
When we place a small wooden block on a rotating disc fixed horizontally to an electric motor we observe
1) the wooden block making revolutions with constant speed
2) the wooden block moves in a circular pat with constant time period
3) the wooden block is said to be in uniform circular motion
4) all the above
Option 4 – all the above
The state of a freely falling body is
1) Heavy weight
2) Less weight
3) Weight less
4) Constant weight
Option 3 – Weight less
Uniform circular motion is an example of
1) Heavy weight
2) uniform accelerated motion
3) uniform motion
4) all the above
Option 1 – Heavy weight
Choose the correct option
1) We observe that an object dropped from certain height falls towards the earth.
2) We know that all planets move around the sun
3) We observe moon moves around the earth
4) All the above
Option 4 – All the above
All planets move around the sun instead of moving in straight line because
1) there must be some force acting on these objects to make them move around another object
2) these objects have natural tendency to make revolutions around another object
3) these objects are forced to move around sun by the star vega
4) all the above
Option 1 – there must be some force acting on these objects to make them move around another object
The force of attraction between the bodies is directly proportional to the product of masses and inversely proportional to the square of the distance between them. This is called
a) universal law of gravitation
b) First law of motion
c) Second law of motion
d) Third law of motion
Option a – universal law of gravitation
The normal force per unit area is called
a) balanced force
b) thrust
c) pressure
d) Pascal
Option c – pressure
The acceleration due to gravity is zero at
a) the equator
b) poles
c) the centre of the earth
d) all of these
Option c – the centre of the earth
Motion of body with constant speed in circular path is called
a) uniform circular motion
b) non-uniform circular motion
c) Both (a) & (b)
d) Neither (a) nor (b)
Option a – uniform circular motion
The net force required to keep a body in uniform circular motion is called
a) Centripetal force
b) Centrifugal force
c) Magnetic force
d) Mechanical force
Option a – Centripetal force
We covered all the class 9 gravitation MCQ online test above in this post for free so that you can practice well for the exam.
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