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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 acceleration magnitude is equal to:
a. The ratio of the magnitude of velocity change during one full revolution to the time taken for that revolution
b. The ratio of velocity change during one revolution to time period
c. The ratio of velocity during one revolution to the time taken
d. None of the above
Option a – The ratio of the magnitude of velocity change during one full revolution to the time taken for that revolution
The angle between the change in velocity Vector and the velocity itself in uniform circular motion tends to:
a. 90°
b. 180°
c. 0°
d. 60°
Option a – 90°
During uniform circular motion:
a. Velocity is tangent to the path
b. Acceleration points inward toward the center
c. Both velocity and acceleration point toward the center
d. Both a and b are correct
Option d – Both a and b are correct
For a particle in uniform circular motion with constant speed v and radius R:
a. Velocity Vectors at successive moments change direction continuously
b. If velocity Vectors are aligned by their tails, they meet at a common origin without rotating
c. The Vector connecting two velocity Vectors indicates the change in velocity
d. All of the above
Option d – All of the above
Over a complete revolution in uniform circular motion, the total change in velocity equals:
a. The sum of all individual magnitudes of velocity changes
b. The difference between the magnitudes of velocity changes
c. The product of magnitudes of velocity changes
d. None of these
Option a – The sum of all individual magnitudes of velocity changes
The type of acceleration that only changes the direction of motion is known as:
a. Gravitational acceleration
b. Constant acceleration
c. Centripetal acceleration
d. Centrifugal acceleration
Option c – Centripetal acceleration
The distance separating the Earth and the Moon is approximately:
a. 384,400 kilometers
b. 384,400 centimeters
c. 84,000 kilometers
d. 86,600 kilometers
Option a – 384,400 kilometers
The gravitational force between two objects is:
a. Always attractive
b. Always repulsive
c. Sometimes attractive
d. Neither attractive nor repulsive
Option a – Always attractive
According to Newton:
a. Gravitational force acts on every object in the universe
b. Only specific objects experience gravitational force
c. Gravitational force cannot exist in a vacuum
d. It depends on the medium between the objects
Option a – Gravitational force acts on every object in the universe
In circular motion, the NET force directed toward the center:
a. Only changes the direction of velocity
b. Constantly causes centripetal acceleration
c. Alters the magnitude of velocity
d. Both a and b are correct
Option d – Both a and b are correct
Gravitational attraction between two masses is:
a. Directly proportional to the product of the masses
b. Inversely proportional to the square of the distance between them
c. Directly proportional to their separation
d. Both a and b
Option d – Both a and b
Non-uniform acceleration occurs in:
a. Earth’s revolution around the Sun
b. Moon’s orbit around the Earth
c. An apple falling to the ground
d. Both a and b
Option d – Both a and b
Newton proposed the concept of:
a. Gravitational interaction between any two masses
b. Gravity only between selected bodies
c. Magnetic force between objects
d. None of these
Option a – Gravitational interaction between any two masses
A wooden block placed on a rotating disc connected to an electric motor will:
a. Revolve at a constant speed
b. Move in a circular path with consistent timing
c. Exhibit uniform circular motion
d. Show all of the above
Option d – Show all of the above
A freely falling object is said to be:
a. Heavier than usual
b. Lighter in weight
c. Weightless
d. Constant in weight
Option c – Weightless
Circular motion with constant speed is an example of:
a. Heavy weight motion
b. Uniformly accelerated motion
c. Steady motion
d. All of the above
Option a – Heavy weight motion
Which statements are true?
a. Objects dropped from a height fall toward Earth
b. Planets revolve around the Sun
c. The Moon orbits the Earth
d. All of the above
Option d – All of the above
Planets revolve around the Sun rather than moving in straight lines because:
a. A force pulls them toward the Sun
b. They naturally orbit larger bodies
c. A star called Vega influences them
d. All of the above
Option a – A force pulls them toward the Sun
The law stating that gravitational force is proportional to the product of masses and inversely proportional to the square of their distance is called:
a. Universal Law of Gravitation
b. Newton’s First Law
c. Newton’s Second Law
d. Newton’s Third Law
Option a – Universal Law of Gravitation
The normal force exerted over a unit area is referred to as:
a. Balanced force
b. Thrust
c. Pressure
d. Pascal
Option c – Pressure
The point where gravity is zero on Earth is:
a. Equator
b. Poles
c. Center of the Earth
d. All of the above
Option c – Center of the Earth
Constant-speed motion along a circular path is termed:
a. Uniform circular motion
b. Non-uniform circular motion
c. Both a and b
d. Neither a nor b
Option a – Uniform circular motion
The NET inward force that keeps a body in circular motion is:
a. Centripetal force
b. Centrifugal force
c. Magnetic force
d. Mechanical force
Option a – Centripetal force
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