🎯 Knowledge Check

Physics — GRAVITATION

50 Questions Class 9 MCQs
1
The force of attraction between any two objects in the universe is called:
2
Who gave the Universal Law of Gravitation?
3
The Universal Law of Gravitation states that every object attracts every other object with a force which is:
4
What does ‘G’ represent in the Universal Law of Gravitation?
5
The value of gravitational constant (G) is:
6
The force of gravitation between two objects depends on:
7
The acceleration due to gravity on Earth is approximately:
8
The acceleration due to gravity does not depend on:
9
The value of ‘g’ is maximum at:
10
The value of ‘g’ decreases as we:
11
Weight of an object is:
12
Mass of an object is measured in:
13
Weight is measured in:
14
Which of the following quantities remains constant everywhere?
15
On the Moon, a body will weigh:
16
The Earth attracts the Moon because of:
17
The motion of the Moon around Earth is due to:
18
The universal law of gravitation helps in calculating:
19
The mass of Earth is approximately:
20
The radius of Earth is approximately:
21
The formula for gravitational force is:
22
The value of ‘g’ on the surface of Earth is obtained using formula:
23
Weightlessness occurs when:
24
The density of Earth is about:
25
Which of these has the least gravitational force?
26
The pressure exerted by a liquid column depends on:
27
The unit of pressure is:
28
Pressure in a fluid at rest increases with:
29
Buoyant force acts:
30
The upward force exerted by a liquid on a body immersed in it is called:
31
When a body is fully or partially immersed in a fluid, it experiences an upward force equal to:
32
Archimedes’ principle helps to determine:
33
Thrust is defined as:
34
SI unit of thrust is:
35
The SI unit of density is:
36
Relative density has:
37
The relative density of water is:
38
If a body floats on water, its weight is:
39
A body sinks in water when:
40
A body will float in a liquid if:
41
The loss of weight of a body immersed in a liquid is equal to:
42
An object weighs 10 N in air and 6 N in water. The buoyant force on it is:
43
The acceleration due to gravity on the Moon is approximately:
44
A freely falling body on Earth experiences:
45
The gravitational force between two bodies decreases if:
46
The path of planets around the Sun is:
47
The force which acts on the Earth and keeps it moving around the Sun is:
48
The gravitational force between two objects will become four times if:
49
If the mass of one body is doubled, the gravitational force between two bodies:
50
The gravitational force between two objects is zero when:

Frequently Asked Questions

Gravitation is the force of attraction between any two objects in the universe.

Sir Isaac Newton formulated the Universal Law of Gravitation.

Every object attracts every other object with a force proportional to the product of their masses and inversely proportional to the square of the distance between them.

\(F=G \frac{Mm}{d^2}\), where \(G\) is gravitational constant, \(M\) and \(m\) are masses, and \(d\) is distance.

Free fall is the motion of an object under gravity only, without air resistance.

It is the acceleration produced in a body due to gravitational force, denoted by \(g\), approximately \(9.8\, m/s^2\) on Earth.

Because acceleration due to gravity is constant and does not depend on mass when air resistance is negligible.

Mass is the amount of matter; weight is the force of gravity on the mass and can vary by location.

Moon’s gravity is about 1/6th Earth's, so weight decreases but mass remains the same.

Buoyancy is the upward force exerted by a fluid that opposes the weight of an object immersed in it.

Buoyant force on an object equals the weight of the fluid displaced by it.

The Moon and Sun’s gravity pull ocean water, causing tides.

‘g’ is acceleration due to gravity, varying slightly with location on Earth.

It keeps planets, moons, and satellites in orbit, shapes galaxies, and causes tides.

Earth’s gravity pulls all objects towards its center.

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