Your profile pic

PHYSICS MCQs

100 Questions TextBook
1

According to the PDF, which of the following is an example of a contact force?

A
Gravitational force
B
Magnetic force
C
Friction
D
Electrostatic force
2

A non-contact force is also known as a?

A
Field force
B
Frictional force
C
Tension force
D
Normal force
3

Newton's first law of motion is also known as the law of?

A
Action-reaction
B
Inertia
C
Momentum
D
Gravitation
4

The SI unit of force is?

A
Kilogram
B
Meter per second
C
Joule
D
Newton
5

One newton (1 N) is the force that produces an acceleration of 1 m/s² in a body of mass?

A
1 g
B
10 kg
C
1 kg
D
100 g
6

According to Newton's third law, for every action, there is an equal and opposite?

A
Force
B
Momentum
C
Inertia
D
Reaction
7

Which force keeps the Earth in orbit around the Sun?

A
Magnetic force
B
Electrostatic force
C
Gravitational force
D
Nuclear force
8

The weakest of the four fundamental forces is?

A
Electromagnetic force
B
Strong nuclear force
C
Weak nuclear force
D
Gravitational force
9

What is the product of mass and velocity known as?

A
Impulse
B
Force
C
Momentum
D
Inertia
10

The weight of an object is a measure of the?

A
Quantity of matter
B
Gravitational force on it
C
Inertia of the object
D
Friction it experiences
11

A body is in a state of uniform motion. What is the net force acting on it?

A
Increasing
B
Decreasing
C
Zero
D
Cannot be determined
12

Mass is a __________ quantity.

A
Vector
B
Scalar
C
Fundamental
D
Derived
13

The force of friction that exists before an object starts to move is called?

A
Kinetic friction
B
Rolling friction
C
Static friction
D
Limiting friction
14

The force F, mass m, and acceleration a are related by the equation?

A
F = m/a
B
F = a/m
C
F = ma
D
F = m-a
15

When a car stops suddenly, passengers tend to bend forward due to?

A
Momentum
B
Velocity
C
Friction
D
Inertia
16

The upward force exerted by a liquid on an object immersed in it is called?

A
Drag
B
Thrust
C
Tension
D
Normal force
17

Which scientist was awarded the Nobel Prize for helping unify the weak and electromagnetic forces?

A
Isaac Newton
B
Albert Einstein
C
Dr. Abdus Salam
D
Sheldon Glashow
18

A free-body diagram is used to show?

A
Only the gravitational force
B
Only the motion of the body
C
All forces acting on an object
D
The mass of the object
19

The SI unit of momentum is?

A
N s
B
kg m/s²
C
N/m
D
kg/s
20

Impulse is defined as the product of force and?

A
Distance
B
Time interval
C
Velocity
D
Mass
21

Rolling friction is generally _________ than sliding friction.

A
Greater
B
Equal to
C
Much less
D
Slightly more
22

The constant velocity reached by a falling object when air resistance equals the force of gravity is called?

A
Escape velocity
B
Initial velocity
C
Terminal velocity
D
Final velocity
23

Which of the following is NOT a fundamental force in nature?

A
Gravitational force
B
Electromagnetic force
C
Tension force
D
Strong nuclear force
24

An electronic balance is described as being more precise than a?

A
Spring balance
B
Digital force meter
C
Mechanical balance
D
Newton meter
25

The force that brings certain materials like rubber bands back to their original shape after deformation is?

A
Tension force
B
Elastic force
C
Normal force
D
Drag force
26

The value of the gravitational constant G is?

A
9.8 m/s²
B
6.67 x 10^-11 N m²/kg²
C
10 N/kg
D
3.0 x 10^8 m/s
27

The force responsible for the beta decay of a nucleus is the?

A
Strong nuclear force
B
Electromagnetic force
C
Gravitational force
D
Weak nuclear force
28

The process of making a vehicle's shape pointed from the front to reduce air friction is called?

A
Streamlining
B
Balancing
C
Minimizing
D
Lubricating
29

When a bullet is fired from a gun, the gun recoils. This is an example of?

A
Newton's first law
B
Newton's second law
C
Newton's third law
D
Law of gravitation
30

The mass of an object is a measure of its?

A
Weight
B
Inertia
C
Volume
D
Force
31

Weight is a __________ quantity.

A
Scalar
B
Base
C
Vector
D
Dimensionless
32

A spring balance is an instrument used to measure?

A
Mass
B
Time
C
Force
D
Length
33

The friction between two solid surfaces in motion is called?

A
Static friction
B
Kinetic friction
C
Rolling friction
D
Limiting friction
34

The rate of change of momentum of a body is equal to the?

A
Impulse
B
Force acting on it
C
Acceleration
D
Total energy
35

In an isolated system, the total momentum before a collision is __________ the total momentum after the collision.

A
Greater than
B
Less than
C
Equal to
D
Half of
36

The force of reaction exerted by a surface on an object lying on it is the?

A
Gravitational force
B
Friction
C
Weight
D
Normal force
37

Which force is responsible for holding protons and neutrons together in the nucleus?

A
Gravitational force
B
Electromagnetic force
C
Weak nuclear force
D
Strong nuclear force
38

A force meter is also known as a?

A
Barometer
B
Thermometer
C
Newton meter
D
Voltmeter
39

The energy wasted due to friction often appears in the form of?

A
Light
B
Sound
C
Heat
D
Potential energy
40

Ball bearings are used in machines to convert sliding friction into?

A
Static friction
B
Kinetic friction
C
Rolling friction
D
No friction
41

The unit of gravitational field strength 'g' can be expressed as?

A
N kg
B
kg/N
C
N/kg
D
N s
42

The principle of conservation of momentum applies to?

A
Macro-objects only
B
Micro-objects only
C
Both macro and micro-objects
D
Only objects at rest
43

Crumple zones in automobiles are designed to?

A
Increase the force of impact
B
Increase the time of impact
C
Make the car heavier
D
Decrease the car's inertia
44

The force that opposes the motion of a body through a fluid is called?

A
Thrust
B
Drag
C
Tension
D
Air resistance
45

For a body moving with constant velocity, its acceleration is?

A
Constant and non-zero
B
Increasing
C
Decreasing
D
Zero
46

If a net force F acts on a mass m, the acceleration is inversely proportional to?

A
The force F
B
The velocity v
C
The mass m
D
Time t
47

According to the text, what is the approximate value of 'g' used for calculations?

A
9.8 m/s²
B
10 N/kg
C
6.67 N/kg
D
9.8 N
48

Newton's laws of motion are not exact when an object is moving close to the speed of?

A
Sound
B
Light
C
Rotation of Earth
D
A car
49

The turning effect of a force is called?

A
Momentum
B
Torque
C
Power
D
Work
50

The SI unit of torque is?

A
Newton
B
Joule
C
Watt
D
Newton-metre
51

A couple is formed by two forces that are?

A
Equal and in the same direction
B
Unequal and opposite
C
Equal and opposite
D
Unequal and in the same direction
52

For a body to be in complete equilibrium, which condition must be met?

A
ΣF = 0 only
B
Στ = 0 only
C
ΣF = 0 and Στ = 0
D
ΣF ≠ 0
53

A body at rest is said to be in?

A
Dynamic equilibrium
B
Unstable equilibrium
C
Neutral equilibrium
D
Static equilibrium
54

Where is the centre of gravity of a uniform rectangle located?

A
At one corner
B
At the centre of the longest side
C
At the point of intersection of its diagonals
D
Outside the body
55

A body moving with uniform velocity is in?

A
Static equilibrium
B
Dynamic equilibrium
C
Rotational equilibrium
D
Unstable equilibrium
56

The stability of a racing car is increased by?

A
Increasing its height
B
Lowering its centre of gravity
C
Reducing its base area
D
Making it lighter
57

What provides the necessary centripetal force for the Moon to orbit the Earth?

A
Tension
B
Friction
C
Earth's gravitational pull
D
Solar wind
58

The formula for centripetal force is?

A
F = ma
B
F = m/v²r
C
F = mv²/r
D
F = vr²/m
59

A torque that produces an anticlockwise rotation is generally considered?

A
Negative
B
Zero
C
Positive
D
Neutral
60

The perpendicular distance from the axis of rotation to the line of action of the force is called?

A
Pivot
B
Moment arm
C
Lever arm
D
Both B and C
61

If a body is in translational equilibrium, what can be said about the net force acting on it?

A
It is maximum
B
It is constant but not zero
C
It is zero
D
It is negative
62

The y-component of a force F making an angle θ with the x-axis is given by?

A
F cosθ
B
F tanθ
C
F sinθ
D
F/cosθ
63

The point where the whole weight of the body appears to act vertically downward is called?

A
Centre of mass
B
Centre of gravity
C
Pivot
D
Axis of rotation
64

In a state of stable equilibrium, the centre of gravity is at its?

A
Highest position
B
Lowest position
C
Middle position
D
Outside the body
65

A body in neutral equilibrium comes to rest in its new position without any change in its?

A
Mass
B
Weight
C
Centre of mass position
D
Velocity
66

A paratrooper descending with a uniform velocity is an example of?

A
Static equilibrium
B
Unstable equilibrium
C
Dynamic equilibrium
D
Neutral equilibrium
67

The second condition of equilibrium states that the vector sum of all torques acting on a body must be?

A
Zero
B
Positive
C
Negative
D
One
68

What happens to the torque if the moment arm is doubled while the force remains constant?

A
It is halved
B
It remains the same
C
It is doubled
D
It becomes zero
69

A tight rope walker carries a long pole to?

A
Increase his weight
B
Lower his centre of gravity
C
Increase his moment of inertia
D
Look good
70

Where is the centre of gravity of a solid sphere?

A
On its surface
B
At its centre
C
Outside the sphere
D
At the bottom
71

Which of the following is an example of neutral equilibrium?

A
A book lying on a table
B
A cone balanced on its tip
C
A ball rolling on a horizontal surface
D
A chair in its normal position
72

The x-component of a force F making an angle θ with the x-axis is given by?

A
F sinθ
B
F cosθ
C
F tanθ
D
F/sinθ
73

Forces that are parallel but have opposite directions are called?

A
Like parallel forces
B
Unlike parallel forces
C
Coplanar forces
D
Vector forces
74

The process of splitting a force into its perpendicular components is called?

A
Addition of forces
B
Resolution of a force
C
Resultant force
D
Composition of forces
75

A body is said to be in equilibrium if it has no?

A
Velocity
B
Momentum
C
Acceleration
D
Mass
76

In an unopened bottle, a small force applied at a longer moment arm produces?

A
Less torque
B
More torque
C
Zero torque
D
Negative torque
77

The centre of mass of an object coincides with its centre of gravity when?

A
The object is very large
B
g is not uniform
C
g is almost uniform
D
The object is in space
78

A cone resting on its side is an example of which type of equilibrium?

A
Stable
B
Unstable
C
Neutral
D
Dynamic
79

In a cream separator, the lighter cream particles gather at the?

A
Walls of the container
B
Bottom of the container
C
Central part of the machine
D
Top surface
80

When a body is in stable equilibrium, a slight tilt causes its centre of gravity to?

A
Be lowered
B
Remain at the same height
C
Be raised
D
Move horizontally
81

Which of the following is NOT a vector quantity?

A
Force
B
Torque
C
Moment arm
D
Velocity
82

The torque produced by a couple depends on?

A
The magnitude of one force and the couple arm
B
The magnitude of both forces only
C
The direction of the forces only
D
The point of application
83

The number of perpendicular components a force can be resolved into is usually?

A
One
B
Two
C
Three
D
Four
84

The first condition of equilibrium deals with?

A
Rotational motion
B
Translational motion
C
Circular motion
D
Vibratory motion
85

A door is easier to open by applying force at the?

A
Hinge
B
Middle of the door
C
Handle (farthest from hinge)
D
Top edge
86

Which law of motion is analogous to the principle of a rotating object continuing its motion?

A
Newton's First Law
B
Newton's Second Law
C
Newton's Third Law
D
Law of Gravitation
87

When a car turns, the force that provides the necessary centripetal force is?

A
Engine thrust
B
Gravity
C
Air resistance
D
Friction between tires and road
88

What is the centre of gravity of a uniform metre rule?

A
At the 0 cm mark
B
At its centre (50 cm mark)
C
At the 100 cm mark
D
Depends on its weight
89

If the line of action of a force passes through the axis of rotation, the torque produced is?

A
Maximum
B
Minimum
C
Zero
D
Infinite
90

A body that does not deform under the action of a force is called a?

A
Soft body
B
Plastic body
C
Elastic body
D
Rigid body
91

The direction of velocity in a circular motion is always?

A
Towards the centre
B
Away from the centre
C
Along the tangent to the circle
D
Perpendicular to the tangent
92

A body in unstable equilibrium will do what after a slight tilt?

A
Return to its original position
B
Move to a new stable position
C
Continue to move further away from its original position
D
Oscillate
93

Where can the centre of gravity of a bowl lie?

A
Inside the material
B
On the rim
C
Outside the material
D
Always at the bottom
94

The sum of clockwise moments equals the sum of anticlockwise moments is known as?

A
Principle of torque
B
Principle of moments
C
First condition of equilibrium
D
Second law of motion
95

A washing machine's dryer uses which principle to dry clothes quickly?

A
Gravity
B
Friction
C
Centripetal force
D
Equilibrium
96

The two conditions of equilibrium ensure a body has neither translational nor ______ acceleration.

A
Linear
B
Rotational
C
Uniform
D
Variable
97

To turn a steering wheel, one applies a?

A
Single force
B
Couple
C
Torque
D
Both B and C
98

What is the work done if a force is perpendicular to the direction of displacement?

A
Maximum
B
Minimum
C
Zero
D
Negative
99

Work is considered a _______ quantity because it does not convey directional information.

A
vector
B
scalar
C
fundamental
D
derived
100

The SI unit of work, the joule (J), is equivalent to:

A
N/m
B
N s
C
kg m/s²
D
N m