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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
A sharp needle applies pressure on a surface that is:
(a) Greater than that applied by a blunt needle
(b) Lesser than that of a blunt needle
(c) Equal to the pressure from a blunt needle
(d) None of the above
Option a – Greater than that applied by a blunt needle
What is the force called that pulls objects toward each other?
(a) Intermolecular attraction
(b) Buoyant force
(c) Friction between celestial bodies
(d) Gravitational force
Option d – Gravitational force
In which direction does the buoyant force act on an object submerged in a Fluid?
(a) Downward
(b) Sideways
(c) Upward
(d) None of the above
Option c – Upward
The universal law of Gravitation describes that:
(a) All objects attract each other with a force
(b) This force is proportional to the product of their masses
(c) The force reduces with the square of the distance between them
(d) All the above
Option d – All the above
What causes the Moon to revolve around the Earth?
(a) Centrifugal force
(b) Centripetal force
(c) Neither a nor b
(d) Both a and b
Option b – Centripetal force
What is the weight of an object at Earth’s core?
(a) Zero
(b) Infinite
(c) Same as elsewhere
(d) Slightly higher than at the poles
Option a – Zero
How can the weight of an object best be defined?
(a) It is the gravity of its Mass
(b) It is a measure of inertia
(c) It is the Mass expressed in different units
(d) It is the gravitational pull acting on it
Option d – It is the gravitational pull acting on it
What do all freely falling bodies in a vacuum share in common?
(a) Identical speed
(b) Same velocity
(c) Equal acceleration
(d) Equal force
Option c – Equal acceleration
What provides the necessary centripetal force for a planet to revolve around the Sun?
(a) Repulsion between the planet and the Sun
(b) Sun’s gravitational pull
(d) All of the above
Option b – Sun’s gravitational pull
At which place is gravitational acceleration (g) the highest?
(a) Peak of Mount Everest
(b) Summit of Qutub Minar
(c) Equatorial region
(d) An Antarctic camp
Option d – An Antarctic camp
What is the direction of acceleration due to gravity when a ball is thrown upward?
(a) Opposite to the motion
(b) Same as the motion
(c) Increases during descent
(d) Becomes zero at the peak
Option a – Opposite to the motion
The force that enables circular motion and causes acceleration acts:
(a) Toward the center
(b) Away from the center
(c) Along the tangent of the circle
(d) In the direction of motion
Option a – Toward the center
All objects, regardless of size, fall under:
(a) The same force
(b) The same acceleration
(c) The same speed
(d) The same momentum
Option b – The same acceleration
Why do astronauts experience weightlessness while orbiting the Earth?
(a) Due to zero gravity
(b) Because of inertia
(c) Caused by acceleration
(d) Due to center of gravity
Option a – Due to zero gravity
What is the direction of gravitational force on a freely falling body?
(a) Opposite to the motion
(b) In the same direction as motion
(c) No force acts
(d) The force stays unchanged
Option b – In the same direction as motion
The gravitational pull between two objects is unaffected by:
(a) The distance between them
(b) The multiplication of their masses
(c) The total of their masses
(d) The gravitational constant
Option c – The total of their masses
How does gravitational acceleration behave across Earth?
(a) Same value throughout space
(b) Uniform across Earth
(c) Changes with latitude
(d) Stronger on the Moon due to smaller size
Option c – Changes with latitude
Newton’s law of Gravitation applies to:
(a) Solar system bodies only
(b) Objects on Earth only
(c) Planets alone
(d) Every object in the universe
Option d – Every object in the universe
If a substance floats on water but sinks in coconut oil, its density must be:
(a) Less than water
(b) More than coconut oil
(c) Both a and b
(d) Cannot be determined
Option c – Both a and b
Which of the following equations correctly relates the gravitational constant?
(a) G = Fd² / (M × m)
(b) G = gM / R²
(c) G = g
(d) All of the above
Option a – G = Fd² / (M × m)
What happens to the gravitational force if both masses are halved but the distance stays the same?
(a) It becomes one-fourth
(b) It becomes half
(c) It remains unchanged
(d) It becomes double
Option a – It becomes one-fourth
A boy swings a stone tied to a string in a horizontal circle. If the string snaps, the stone:
(a) Continues in circular motion
(b) Moves straight toward the center
(c) Moves tangentially in a straight line
(d) Moves perpendicularly away from the path
Option c – Moves tangentially in a straight line
Why does an iron nail sink in water?
(a) Its weight is less than the buoyant force
(b) Its weight equals the buoyant force
(c) Its weight is greater than the buoyant force
(d) Its weight increases in water
Option c – Its weight is greater than the buoyant force
What happens if common Salt is added to water where an object is just floating?
(a) The submerged volume of the object decreases
(b) The object sinks
(c) The object first sinks, then rises
(d) Cannot be predicted
Option a – The submerged volume of the object decreases
Which of the following summarizes Kepler’s laws?
(a) Planet orbits are elliptical with the Sun at a focus
(b) Planets sweep equal areas in equal time
(c) The cube of the mean distance is proportional to the square of the time period
(d) All of the above
Option d – All of the above
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