Looking for authentic SEBA Class 9 Science Chapter 10 (Gravitation) MCQ solutions for the 2026–27 academic year? Access complete multiple-choice questions on Universal Law of Gravitation, mass vs. weight, acceleration due to gravity (g), buoyancy, and Archimedes’ Principle with correct options and clear explanations to score top marks in your exams.
MCQ
- Gravitation is the force of attraction between:
a) Only planets
b) Only Earth and Moon
c) Every object in the universe
d) Only stars
Answer: c) Every object in the universe
- The force with which the Earth attracts an apple is called:
a) Thrust
b) Weight
c) Buoyancy
d) Friction
Answer: b) Weight
- Newton’s idea about gravitation:
a) Only planets attract each other
b) Same type of force acts on apples, moon, and planets
c) Only Earth attracts objects
d) Gravity acts randomly
Answer: b) Same type of force acts on apples, moon, and planets
- Gravitational force acts:
a) Horizontally
b) Vertically
c) Along the line joining centers of objects
d) Anywhere
Answer: c) Along the line joining centers of objects
- If the distance between two objects is doubled, gravitational force:
a) Doubles
b) Halves
c) Reduces to one-fourth
d) Remains the same
Answer: c) Reduces to one-fourth
- If the mass of one object is doubled, the gravitational force:
a) Remains same
b) Doubles
c) Halves
d) Quadruples
Answer: b) Doubles
- The universal gravitational constant G =
a) 9.8 N m^2/kg^2
b) 6.673 * 10^-11 N m^2/kg^2
c) 1 N m^2/kg^2
d) 10^-9 N m^2/kg^2
Answer: b) 6.673 * 10^-11 N m^2/kg^2
8. SI unit of gravitational force:
a) Pascal
b) Newton
c) Joule
d) Kg m/s^2
Answer: b) Newton
9. Why does Earth not move noticeably toward an apple?
a) Apple does not attract Earth
b) Earth’s mass is huge -> negligible acceleration
c) Gravity acts only on apple
d) Apple’s force is zero
Answer: b) Earth’s mass is huge -> negligible acceleration
10. Moon orbiting Earth is an example of:
a) Friction
b) Centripetal force
c) Weight
d) Upthrust
Answer: b) Centripetal force
Class 9 Science Chapter 10 Objective Questions
11. Centripetal force always acts:
a) Away from center
b) Toward center
c) Along tangent
d) Randomly
Answer: b) Toward center
12. Without centripetal force, an object in circular motion:
a) Stays in circle
b) Moves straight tangent
c) Falls down
d) Stops
Answer: b) Moves straight tangent
13. Free fall means an object falls:
a) Only under gravity
b) Only due to air resistance
c) With horizontal motion
d) With upward force
Answer: a) Only under gravity
14. Acceleration due to gravity (g) near Earth ≈
a) 1 m/s^2
b) 9.8 m/s^2
c) 10^-3 m/s^2
d) 100 m/s^2
Answer: b) 9.8 m/s^2
15. Mass of an object affects:
a) Its free fall rate
b) Its inertia
c) g value
d) Gravity
Answer: b) Its inertia
16. All objects fall at the same rate in vacuum because:
a) Air resistance is absent
b) Heavy objects fall faster
c) Light objects float
d) g changes
Answer: a) Air resistance is absent
17. Formula for force on a falling object:
a) F = m + g
b) F = m * g
c) F = g / m
d) F = m / g
Answer: b) F = m * g
18. Equations of motion with g:
a) v = u + g * t
b)s = u * t + (1/2) * g * t^2
c)v^2 = u^2 + 2 * g * s
Answer: c)v^2 = u^2 + 2 * g * s
19. Maximum height formula for vertically thrown object:
a) H = u^2 / (2 * g)
b) H = g^2 / u
c) H = u / g
d) H = g / u^2
Answer: a) H = u^2 / (2 * g)
20. Total time of flight for vertically thrown object:
a) t = u / g
b) t = 2 * u / g
c) t = u^2 / g
d) t = g / u
Answer: b) t = 2 * u / g
SEBA Class 9 Science Chapter 10 Multiple Choice Questions
21. Mass of an object:
a) Changes on Moon
b) Constant everywhere
c) Same as weight
d) Measured in N
Answer: b) Constant everywhere
22. Weight of an object:
a) Independent of g
b) Force due to gravity
c) Always equal to mass
d) Measured in kg
Answer: b) Force due to gravity
23. Formula for weight:
a) W = m + g
b) W = m * g
c) W = g / m
d) W = m^2 * g
Answer: b) W = m * g
24. Weight on Moon is less than on Earth because:
a) Moon’s radius is bigger
b) Moon’s mass is smaller
c) g is same everywhere
d) Object’s mass reduces
Answer: b) Moon’s mass is smaller
25. Unit of weight:
a) kg
b) N
c) Pa
d) m/s^2
Answer: b) N
26. If g increases, weight:
a) Decreases
b) Increases
c) Remains same
d) Becomes zero
Answer: b) Increases
27. On poles, weight is slightly:
a) Less b) More
c) Same as equator
d) Zero
Answer: b) More
28. Thrust is:
a) Force along tangent
b) Force acting perpendicular to surface
c) Upward force only
d) Friction
Answer: b) Force acting perpendicular to surface
29. Pressure formula:
a) Pressure = Thrust * Area
b) Pressure = Thrust / Area
c) Pressure = Area / Thrust
d) Pressure = Thrust^2 / Area
Answer: b) Pressure = Thrust / Area
30. SI unit of pressure:
a) N/m^2
b) N m^2/kg^2
c) Pascal per m^2
d) Joule
Answer: a) N/m^2
Class 9 Science Chapter 10 MCQ Question Answer SEBA 2026-27
31. Standing on sand -> feet sink because:
a) Thrust is more
b) Pressure is high
c) Pressure is low
d) Thrust decreases
Answer: b) Pressure is high
32. Lying down on sand -> body doesn’t sink because:
a) Weight decreases
b) Pressure is low
c) Thrust increases
d) Gravity disappears
Answer: b) Pressure is low
33. Example of thrust:
a) Floating ship
b) Pin on board
c) Falling stone
d) Moon orbit
Answer: b) Pin on board
34. Fluids exert pressure:
a) Only downward
b) In all directions
c) Only upward
d) Randomly
Answer: b) In all directions
35. Upward force by fluid on object =
a) Weight
b) Buoyant force
c) Thrust
d) Gravity
Answer: b) Buoyant force
36. Object floats if:
a) Upthrust < Weight
b) Upthrust > Weight
c) Mass > Volume
d) Density > fluid
Answer: b) Upthrust > Weight
37. Object sinks if:
a) Density < fluid
b) Density = fluid
c) Density > fluid
d) Volume > fluid
Answer: c) Density > fluid
38. Archimedes’ principle:
a) Upthrust = Weight of object
b) Upthrust = Weight of fluid displaced
c) Upthrust = Thrust * Area
d) Upthrust = Pressure * Volume
Answer: b) Upthrust = Weight of fluid displaced
39. Floating of cork on water is because:
a) Density of cork < Density of water
b) Density of cork > Density of water
c) Weight of cork > Upthrust
d) g decreases
Answer: a) Density of cork < Density of water
40. Sinking of iron nail in water is because:
a) Upthrust > Weight
b) Density > Water
c) g = 0
d) Fluid is light
Answer: b) Density > Water
SEBA Class 9 Science Chapter 10 MCQ Solutions
41. If object fully immersed -> spring balance reading:
a) Decreases initially, constant later
b) Increases
c) Zero
d) Random
Answer: a) Decreases initially, constant later
42. Magnitude of buoyant force depends on:
a) Density of fluid
b) Mass of object only
c) Gravity only
d) Shape only
Answer: a) Density of fluid
43. Buoyant force acts:
a) Downward
b) Upward
c) Horizontally
d) Random
Answer: b) Upward
44. Ships float because:
a) They are heavy
b) Upthrust = Weight of water displaced
c) Steel is light
d) Gravity disappears
Answer: b) Upthrust = Weight of water displaced
45. Lactometer works based on:
a) Thrust
b) Density & Buoyancy
c) Weight only
d) Pressure
Answer: b) Density & Buoyancy
46. Hydrometer measures:
a) Mass
b) Pressure
c) Density of liquids
d) Weight
Answer: c) Density of liquids
47. All objects fall at same rate in vacuum because:
a) g = 0
b) No air resistance
c) Mass is zero
d) Thrust is zero
Answer: b) No air resistance
48. Mass measures:
a) Weight
b) Inertia
c) Pressure
d) Buoyancy
Answer: b) Inertia
49. Pressure in a fluid:
a) Acts only vertically
b) Transmitted equally in all directions
c) Acts only horizontally
d) Zero
Answer: b) Transmitted equally in all directions
50. When an object is pushed deeper in water, buoyant force:
a) Decreases
b) Increases
c) Remains same
d) Becomes zero
Answer: b) Increases
MCQ
- Whirling Stone on a Thread
Take a stone tied to a thread and whirl it in a circle. When the thread is released, the stone:
a) Continues in a circular path
b) Moves in a straight line tangential to the circle
c) Moves back to your hand
d) Stops immediately
Answer: b) Moves in a straight line tangential to the circle
- Stone Thrown Upwards
When a stone is thrown vertically upwards, after reaching the maximum height, it:
a) Stops in the air
b) Falls downwards due to gravity
c) Continues moving upwards forever
d) Moves sideways
Answer: b) Falls downwards due to gravity
- Paper and Stone Falling Experiment
When a sheet of paper and a stone are dropped simultaneously from the same height, which reaches the ground first?
a) Paper
b) Stone
c) Both at the same time
d) Cannot say
Answer: b) Stone
- Effect of Air Resistance
Why does the paper take longer to reach the ground than the stone?
a) Paper is heavier
b) Paper has more air resistance
c) Paper is lighter than air
d) Stone pushes paper down
Answer: b) Paper has more air resistance
- Bottle in Water (Buoyancy)
An empty plastic bottle floats on water because:
a) It is light
b) Water exerts an upward force called buoyant force
c) Gravity does not act on the bottle
d) The bottle is airtight
Answer: b) Water exerts an upward force called buoyant force
- Pushing Bottle Deeper
When you push the bottle deeper into water:
a) It goes down easily
b) The upward force decreases
c) The upward force increases
d) The bottle sinks automatically
Answer: c) The upward force increases
- Bottle Release Experiment
When the bottle is released after pushing it into water:
a) It stays underwater
b) It rises to the surface
c) It moves sideways
d) It disappears
Answer: b) It rises to the surface
- Immersing the Bottle Completely
How can you keep the bottle fully submerged in water?
a) Release it slowly
b) Apply an external downward force
c) Make it heavier than water
d) Poke holes in it
Answer: b) Apply an external downward force
- Iron Nail on Water
When an iron nail is placed on the surface of water, it:
a) Floats
b) Sinks
c) Hovers
d) Dissolves
Answer: b) Sinks
- Cork vs Iron Nail
When a piece of cork and an iron nail of equal mass are placed on water:
a) Both float
b) Cork floats, iron nail sinks
c) Cork sinks, iron nail floats
d) Both sink
Answer: b) Cork floats, iron nail sinks
🔬 Updated MCQ Guide Notice: This page features a full collection of SEBA Class 9 Science Chapter 10 (Gravitation) Multiple Choice Questions (MCQs) with accurate options and step-by-step explanations, fully updated for the 2026–27 academic session in accordance with the latest revised Assam Board (SEBA) textbook.
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