Class 9 Gravitation MCQ. We covered all the Class 9 Gravitation MCQ in this post for free so that you can practice well for the exam.
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MCQ on Gravitation for Students
The pressure exerted by a sharp needle on a surface is :
(a) more than the pressure exerted by a blunt needle
(b) less than the pressure exerted by a blunt needle
(c) equal to the pressure exerted by a blunt needle
(d) None of these
Option a – more than the pressure exerted by a blunt needle
Which of the following is the force of attraction that exists between objects?
(a) The intermolecular force of attraction
(b) The force of buoyancy
(c) The friction between the planet and the Sun
(d) The force of attraction between objects is called the gravitational force.
The buoyant force on an object due to a fluid always acts :
(a) in the downward direction
(b) sideways
(c) in the upper direction
(d) None of these
Option c – in the upper direction
The universal law of gravitation states that every object in the universe
(a) Attracts every other object with a force
(b) The force of attraction is proportional to the product of their masses
(c) The force is inversely proportional to the square of the distance between them
(d) All of these
Option d – All of these
The motion of the moon around the earth is due to
(a) the centrifugal force
(b) the centripetal force
(c) Neither (a) nor (b)
(d) Both (a) and (b)
Option b – the centripetal force
The weight of a body at the center of the earth is
(a) zero
(b) infinite
(c) same as at other places
(d) slightly greater than that at the poles
Option a – zero
The weight of an object
(a) is the gravity of the matter it contains
(b) refers to its inertia
(c) is the same as its mass but expressed in different units
(d) is the force with which it is attracted to the earth
Option d – is the force with which it is attracted to the earth
In a vacuum, all freely falling objects
(a) have the same speed
(b) have the same velocity
(c) have the same acceleration
(d) have the same force
Option c – have the same acceleration
The centripetal force is provided to the planet by the
(a) the force of repulsion between the planet and the Sun
(b) the force of attraction of the Sun
(c) the heat energy of the Sun
(d) All of these
Option b – the force of attraction of the Sun
At which of the following locations, the value of g is the largest?
(a) On top of Mount Everest
(b) On top of Qutub Minar
(c) At a place on the equator
(d) A camp site in Antarctica
Option d – A camp site in Antarctica
A ball is thrown vertically upwards. The acceleration is due to gravity.
(a) is in the direction opposite to the direction of its motion
(b) is in the same direction as the direction of its motion
(c) increases as it comes down
(d) becomes zero at the highest point
Option a – is in the direction opposite to the direction of its motion
The force that causes acceleration and keeps the body moving along the circular path is acting
(a) towards the center
(b) away from the center
(c) along the tangent to the circular path
(d) in the direction of circular motion
Option a – towards the center
All bodies whether large or small fall with the
(a) same force
(b) same acceleration
(c) same velocity
(d) same momentum
Option b – same acceleration
Weightlessness experienced while orbiting the earth in a spaceship is the result of
(a) zero gravity
(b) inertia
(c) acceleration
(d) center of gravity
Option a – zero gravity
When an object falls freely to the earth, the force of gravity is
(a) opposite to the direction of motion
(b) in the same direction as that of motion
(c) zero
(d) constant
Option b – in the same direction as that of motion
The force of gravitation between two bodies does not depend on :
(a) their separation
(b) the product of their masses
(c) the sum of their masses
(d) the gravitational constant
Option c – the sum of their masses
The acceleration due to gravity
(a) has the same values 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
Option c – varies with the latitude on the earth
Newton’s law of gravitation is applicable to
(a) bodies of the solar system only
(b) bodies on the earth
(c) planets only
(d) all bodies of the universe
Option d – all bodies of the universe
A substance floats in water but sinks in coconut oil. The density of the substance
(a) is less than the density of the water
(b) is greater than the density of oil
(c) Both (a) and (b)
(d) Cannot be decided from the given information
Option c – Both (a) and (b)
Pick up the correct relationship
(a) Gravitational constant G = Fd²/M x m
(b) G = g M/R²
(c) G = g
(d) All of these
Option a – Gravitational constant G = Fd²/M x m
The gravitational force between two objects is F. If the masses of both objects are halved without changing the distance between them, then the gravitational force would become
(a) F/4
(b) F/2
(c) F
(d) 2F
Option a – F/4
A boy is whirling a stone tied with a string in a horizontal circular path the string breaks, and the stone
(a) will continue to move in the circular path
(b) will move along a straight line toward the center of the circular path
(c) will move along a straight line tangential to the circular path
(d) will move along a straight line perpendicular to the circular path away from the boy
Option c – will move along a straight line tangential to the circular path
Iron nail sinks in water because : ( Class 9 Gravitation MCQ )
(a) the weight of the nail is less than the buoyant force acting on it due to the water
(b) the weight of the nail is equal to the buoyant force acting on it due to the water
(c) the weight of the nail is greater than the buoyant force acting on it due to the water
(d) the weight of the nail increases in the water
Option c – the weight of the nail is greater than the buoyant force acting on it due to the water
An object just floats in water. If common salt is added to the water ( Class 9 Gravitation MCQ )
(a) the volume of the object immersed in the liquid decreases
(b) the object sinks
(c) the object first sinks and then floats up
(d) cannot be determined
Option a – the volume of the object immersed in the liquid decreases
Kepler’s laws governing the motion of planets are :
(a) The orbit of a planet is an eclipse with the Sun at one of the foci
(b) The line joining the planet and the Sun sweep equal areas in equal intervals of time
(c) The cube of the mean distance of a planet (r) from the Sun is proportional to the square of its orbital period (T)
(d) All of these
Option d – All of these
We covered all the class 9 gravitation mcq above in this post for free so that you can practice well for the exam.
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