# Class 9 Physics Chapter 2

Updated: 15 Oct 2023

2085

Class 9 Physics Chapter 2 is about “Kinematics”. This article includes topics such as Definition of Kinematics, Rest and Motion, Types of Motion, Rest and Motion are Relative, Scalar and Vector Quantities, Distance, Displacement, Speed and types of speed (*Average Speed, Instantaneous Speed, Uniform and Variable Speed* ), Velocity and types of Velocity (*Average Velocity, Instantaneous Velocity, Uniform and Variable Velocity* ), Acceleration and types of Acceleration (*Average Acceleration, Instantaneous Acceleration, Uniform and Variable Acceleration* ), Deceleration/Retardation, Distance-Time Graph, Speed-Time Graph, Velocity Time Graph, Equations of Motion( * First Equation of Motion, Second Equation of Motion, Third Equation of Motion*) and Motion due to Gravity.

## Class 9 Physics Chapter 2 Notes

### Kinematics Notes

Class 9 Physics Chapter 2 Notes

Download Chapter 2 Notes### Kinematics SLO Based Notes

## Physics Class 9 Chapter 2-MCQs

### Kinematics

1 The branch of physics that deals with the study of motion, forces, and energy in physical systems is:(a) Thermodynamics

(b) Optics

(c) Mechanics

(d) Electricity

## Show Answer

**
Mechanics
**

2 The study of motion without the reference of force is said to be:

(a) Kinematics

(b) Mechanics

(c) Dynamics

(d) Motion

## Show Answer

**
Kinematics
**

### Rest and Motion

#### Rest

3 When a body does not change its position with respect to some reference then it will be in state of;(a) Rest

(b) Motion

(c) Rotatory motion

(d) Vibratory motion

## Show Answer

**
Rest
**

#### Motion

4 When a body changes its position with respect to some reference then it will be in state of;(a) Rest

(b) Motion

(c) Rotatory motion

(d) Vibratory motion

## Show Answer

**
Motion
**

**To Download Complete Notes of Physics Notes 9 Class, Click on the given link.**

#### Types of Motion

5 Which type of motion refers to the change in position of a body as a whole?(a) Rotational motion

(b) Curvilinear motion

(c) Translatory motion

(d) Rectilinear motion

## Show Answer

**
Translatory motion
**

6 Which type of motion refers to the motion of an object along a straight line with no change in direction?

(a) Rotational motion

(b) Curvilinear motion

(c) Translatory motion

(d) Rectilinear motion

## Show Answer

**
Rectilinear motion
**

7 Which type of motion refers to the circular or curved path motion?

(a) Rotational motion

(b) Curvilinear motion

(c) Translatory motion

(d) Rectilinear motion

## Show Answer

**
Curvilinear motion
**

8 Which type of motion refers to the irregular motion of a body?

(a) Rotational motion

(b) Curvilinear motion

(c) Random motion

(d) Rectilinear motion

## Show Answer

**
Random motion
**

9 Motion of gas molecules is an example of:

(a) Rectilinear motion

(b) Curvilinear motion

(c) Rotational motion

(d) Random motion

## Show Answer

**
Random motion
**

10 What is the term used for the motion of an object around an axis or a fixed point?

(a) Curvilinear motion

(b) Translatory motion

(c) Rotational motion

(d) Vibrational motion

## Show Answer

**
Rotational motion
**

11 Which type of motion refers to the back-and-forth motion of an object around an equilibrium position?

(a) Curvilinear motion

(b) Translatory motion

(c) Rotational motion

(d) Vibrational motion

## Show Answer

**
Vibrational motion
**

12 The motion of swing is an example of:

(a) Curvilinear motion

(b) Translatory motion

(c) Rotational motion

(d) Vibrational motion

## Show Answer

**
Vibrational motion
**

### Position

13 …………….. is the location of object relative to some reference.(a) Distance

(b) Length

(c) Position

(d) None of these

## Show Answer

**
Position
**

### Rest and Motion are Relatives

14 Rest and motion are …………. states.(a) Relative

(b) Absolute

(c) Constant

(d) All of these

## Show Answer

**
Relative
**

### Scalar and Vector Quantities

15 All those quantities which are completely specified by their magnitude only, are said to be:(a) Scalars

(b) Vectors

(c) Speed

(d) Velocity

## Show Answer

**
Scalars
**

16 All those quantities which are completely specified by their magnitude as well as direction, are said to be:

(a) Scalars

(b) Vectors

(c) Speed

(d) Velocity

## Show Answer

**
Vectors
**

17 Which of the following is a scalar quantity?

(a) Velocity

(b) Time

(c) Displacement

(d) Acceleration

## Show Answer

**
Time
**

18 Which of the following is a vector quantity?

(a) Temperature

(b) Mass

(c) Time

(d) Displacement

## Show Answer

**
Displacement
**

19 Force is an example of ……………. quantity?

(a) Scalar

(b) Vector

(c) Both (a) and (b)

(d) None of these

## Show Answer

**
Vector
**

20 Time is an example of ……………. quantity?

(a) Scalar

(b) Vector

(c) Both (a) and (b)

(d) None of these

## Show Answer

**
Scalar
**

### Distance

21 The length of a path traveled between two positions is called(a) Velocity

(b) Acceleration

(c) Distance

(d) Retardation

## Show Answer

**
Distance
**

22 Which of the following is a scalar quantity?

(a) Distance

(b) Displacement

(c) Velocity

(d) Acceleration

## Show Answer

**
Distance
**

23 The unit of distance is

(a) Newton

(b) Meter

(c) Pascal

(d) Joule

## Show Answer

**
Meter
**

### Displacement

24 The shortest distance between two points is known as(a) Distance

(b) Displacement

(c) Velocity

(d) Acceleration

## Show Answer

**
Displacement
**

25 Displacement is a ……………..quantity.

(a) Scalar

(b) Vector

(c) Tensor

(d) None of these

## Show Answer

**
Vector
**

26 The unit of displacement is

(a) Newton

(b) Meter

(c) Pascal

(d) Joule

## Show Answer

**
Meter
**

27 What is the formula to calculate displacement?

(a) Displacement = final \ position - initial \ position

(b) Displacement = speed \times time

(c) Displacement = distance \times time

(d) None of these

## Show Answer

**
Displacement = final position – initial position
**

### Speed

28 The distance covered by a body in unit time is known as(a) Velocity

(b) Speed

(c) Distance

(d) Displacement

## Show Answer

**
Speed
**

29 What is the SI unit of speed?

(a) meters per second (m/s)

(b) kilometers per hour (km/h)

(c) Meter

(d) Second

## Show Answer

**
meters per second (m/s)
**

30 Speed is a ……………..quantity.

(a) Scalar

(b) Vector

(c) Tensor

(d) None of these

## Show Answer

**
Scalar
**

31 What is the formula for calculating speed?

(a) Speed = \frac{Distance}{Time}

(b) Speed = \frac{Time}{Distance}

(c) Speed = Distance \times Time

(d) None of these

## Show Answer

**
Speed = \frac{Distance}{Time}
**

32 Speed is denoted by:

(a) F

(b) s

(c) v

(d) d

## Show Answer

**
v
**

#### Types of Speed

33 Which type of speed remains constant throughout the motion?(a) Average speed

(b) Instantaneous speed

(c) Uniform speed

(d) Variable speed

## Show Answer

**
Uniform speed
**

34 Total distance divided by total time refers to

(a) Average speed

(b) Instantaneous speed

(c) Uniform speed

(d) Variable speed

## Show Answer

**
Average speed
**

35 The speed of a body for a very short interval of time refers to

(a) Average speed

(b) Instantaneous speed

(c) Uniform speed

(d) Variable speed

## Show Answer

**
Instantaneous speed
**

36 The speedometer of a car indicates its:

(a) Average speed

(b) Instantaneous speed

(c) Uniform speed

(d) Variable speed

## Show Answer

**
Instantaneous speed
**

37 A car travels 100 km in 2 hours. What is its average speed?

(a) 50 km/h

(b) 100 km/h

(c) 150 km/h

(d) 200 km/h

## Show Answer

**
50 km/h
**

38 The speed of light is approximately taken as:

(a) 3 \times 10^5 m/s

(b) 3 \times 10^8 m/s

(c) 3 \times 10^3 m/s

(d) 3 \times 10^{12} m/s

## Show Answer

**
3 \times 10^8 m/s
**

39 What is the formula for average speed?

(a) Speed = distance \times time

(b) Speed = \frac{total \ distance \ traveled}{total \ time \ taken}

(c) Speed = final \ velocity - initial \ velocity

(d) None of these

## Show Answer

**
Speed = \frac{total \ distance \ traveled}{total \ time \ taken}
**

### Velocity

40 The displacement covered by a body in unit time is known as(a) Velocity

(b) Speed

(c) Distance

(d) Displacement

## Show Answer

**
Velocity
**

41 What is the SI unit of velocity?

(a) meters per second (m/s)

(b) kilometers per hour (km/h)

(c) Meter

(d) Second

## Show Answer

**
meters per second (m/s)
**

42 Velocity is a ……………..quantity.

(a) Scalar

(b) Vector

(c) Tensor

(d) None of these

## Show Answer

**
Vector
**

43 What is the formula for calculating velocity?

(a) Velocity = \frac{Displacement}{Time}

(b) Velocity = \frac{Time}{Displacement}

(c) Velocity = Distance \times Time

(d) None of these

## Show Answer

**
Velocity = \frac{Displacement}{Time}
**

44 Velocity is denoted by:

(a) F

(b) s

(c) v

(d) d

## Show Answer

**
v
**

#### Types of Velocity

45 Which type of velocity remains constant throughout the motion?(a) Average velocity

(b) Instantaneous velocity

(c) Uniform velocity

(d) Variable velocity

## Show Answer

**
Instantaneous velocity
**

46 Total displacement divided by total time refers to

(a) Average velocity

(b) Instantaneous velocity

(c) Uniform velocity

(d) Variable velocity

## Show Answer

**
Average velocity
**

47 The velocity of a body for a very short interval of time refers to

(a) Average velocity

(b) Instantaneous velocity

(c) Uniform velocity

(d) Variable velocity

## Show Answer

**
Instantaneous velocity
**

48 What is the formula for average velocity?

(a) Velocity = displacement \times time

(b) Velocity = \frac{total \ displacement}{total \ time \ taken}

(c) Velocity = final \ velocity - initial \ velocity

(d) None of these

## Show Answer

**
Velocity = \frac{total displacement}{total time taken}
**

49 Which of the following quantity has both magnitude and direction?

(a) Speed

(b) Velocity

(c) Distance

(d) Time

## Show Answer

**
Velocity
**

50 A train moves 200 meters north and then 150 meters south. What is its displacement?

(a) 350 meters north

(b) 50 meters south

(c) 50 meters north

(d) 350 meters south

## Show Answer

**
50 meters north
**

### Acceleration

51 The rate of change in velocity is known as(a) Velocity

(b) Speed

(c) Acceleration

(d) Displacement

## Show Answer

**
Acceleration
**

52 What is the SI unit of Acceleration?

(a) meters per second (m/s^2)

(b) kilometers per hour (km/h^2)

(c) Meter

(d) Second

## Show Answer

**
meters per second (m/s^2)
**

53 Acceleration is a ……………..quantity.

(a) Scalar

(b) Vector

(c) Tensor

(d) None of these

## Show Answer

**
Vector
**

54 What is the formula for calculating Acceleration?

(a) Acceleration = \frac{Change \ in \ velocity}{Time}

(b) Acceleration = \frac{Time}{velocity}

(c) Acceleration = Distance \times Time

(d) None of these

## Show Answer

**
Acceleration = \frac{Change \ in \ velocity}{Time}
**

55 Acceleration is denoted by:

(a) F

(b) s

(c) a

(d) d

## Show Answer

**
a
**

#### Types of Acceleration

56 Which type of Acceleration remains constant throughout the motion?(a) Average Acceleration

(b) Instantaneous Acceleration

(c) Uniform Acceleration

(d) Variable Acceleration

## Show Answer

**
Uniform Acceleration
**

57 Total change in velocity divided by total time refers to

(a) Average Acceleration

(b) Instantaneous Acceleration

(c) Uniform Acceleration

(d) Variable Acceleration

## Show Answer

**
Average Acceleration
**

58 The Acceleration of a body for a very short interval of time refers to

(a) Average velocity

(b) Instantaneous velocity

(c) Uniform velocity

(d) Variable velocity

## Show Answer

**
Instantaneous velocity
**

59 What is the formula for average Acceleration?

(a) Acceleration = displacement \times time

(b) Acceleration = \frac{total \ change \ in \ velocity}{total \ time \ taken}

(c) Acceleration = final \ velocity - initial \ velocity

(d) None of these

## Show Answer

**
Acceleration = \frac{total \ change \ in \ velocity}{total \ time \ taken}
**

60 Which of the following quantity has both magnitude and direction?

(a) Speed

(b) Acceleration

(c) Distance

(d) Time

## Show Answer

**
Acceleration
**

61 An object undergoes a constant acceleration of 5 m/s^2 . What will be its change in velocity after 4 seconds?

(a) 9 m/s

(b) 15 m/s

(c) 4 m/s

(d) 20 m/s

## Show Answer

**
20 m/s
**

### Deceleration/ Retardation

62 When an object slows down, its acceleration is called(a) Uniform acceleration

(b) Non-uniform acceleration

(c) Deceleration

(d) None of these

## Show Answer

**
Deceleration
**

### Distance Time Graph

63 Which graph represents the relationship between distance traveled and time elapsed?(a) Velocity-time graph

(b) Speed-time graph

(c) Acceleration-time graph

(d) Distance-time graph

## Show Answer

**
Distance-time graph
**

64 In a distance-time graph, the slope represents:

(a) Speed

(b) Velocity

(c) Time

(d) Acceleration

## Show Answer

**
Speed
**

65 What does a slope of zero speed indicate in a distance-time graph?

(a) The object is not moving

(b) The object is moving with constant speed

(c) The object is moving with variable speed

(d) The object is accelerating

## Show Answer

**
The object is not moving
**

66 The distance is increasing linearly with time, then the body is moving with:

(a) Zero speed

(b) Uniform speed

(c) Variable speed

(d) None of these

## Show Answer

**
Uniform speed
**

67 The distance is changing non-linearly with time, then the body is moving with:

(a) Zero speed

(b) Uniform speed

(c) Variable speed

(d) None of these

## Show Answer

**
Variable speed
**

### Speed Time Graph

68 Which graph represents the relationship between speed and time elapsed?(a) Velocity-time graph

(b) Speed-time graph

(c) Acceleration-time graph

(d) Distance-time graph

## Show Answer

**
Speed-time graph
**

69 In a speed-time graph, the slope represents:

(a) Speed

(b) Velocity

(c) Time

(d) Magnitude of Acceleration

## Show Answer

**
Magnitude of Acceleration
**

70 In a speed-time graph, the area under the curve represents:

(a) Speed

(b) Distance

(c) Time

(d) Displacement

## Show Answer

**
Distance
**

### Velocity Time Graph

71 Which graph represents the relationship between velocity and time elapsed?(a) Velocity-time graph

(b) Speed-time graph

(c) Acceleration-time graph

(d) Distance-time graph

## Show Answer

**
Velocity-time graph
**

72 In a velocity-time graph, the slope represents:

(a) Speed

(b) Velocity

(c) Time

(d) Acceleration

## Show Answer

**
Acceleration
**

73 In a velocity-time graph, the area under the curve represents:

(a) Speed

(b) Distance

(c) Time

(d) Displacement

## Show Answer

**
Displacement
**

### Equations of Motion

74 There are …………. equations of motion.(a) 2

(b) 3

(c) 4

(d) 5

## Show Answer

**
3
**

#### First Equation of Motion

75. Which equation of motion represents the relationship between initial velocity, final velocity, acceleration, and time?(a) First equation of motion

(b) Second equation of motion

(c) Third equation of motion

(d) All of these

## Show Answer

**
First equation of motion
**

76. The first equation of motion is given by:

(a) v_f = v_i + at

(b) s = vi_t + \frac{1}{2}at^2

(c) 2as = v_f^2 - vi_2

(d) None of these

## Show Answer

**
v_f = v_i + at
**

#### Second Equation of Motion

77. Which equation of motion represents the relationship between initial velocity, displacement, acceleration, and time?(a) First equation of motion

(b) Second equation of motion

(c) Third equation of motion

(d) All of these

## Show Answer

**
Second equation of motion
**

78. The second equation of motion is given by:

(a) v_f = v_i + at

(b) s = vi_t + \frac{1}{2}at^2

(c) 2as = v_f^2 - vi_2

(d) None of these

## Show Answer

**
s = vi_t + \frac{1}{2}at^2
**

#### Third Equation of Motion

79. Which equation of motion represents the relationship between initial velocity, final velocity, acceleration, and displacement?(a) First equation of motion

(b) Second equation of motion

(c) Third equation of motion

(d) All of these

## Show Answer

**
Third equation of motion
**

80. The third equation of motion is given by:

(a) v_f = v_i + at

(b) s = vi_t + \frac{1}{2}at^2

(c) 2as = v_f^2 - vi_2

(d) None of these

## Show Answer

**
2as = v_f^2 - vi_2
**

81 The formula for the area of a trapezoid is:

(a) Area = (sum \ of \ parallel \ sides) \times base

(b) Area = \frac{base \times (sum \ of \ parallel \ sides)}{2}

(c) Area = \frac{base}{(sum \ of \ parallel \ sides)}

(d) None of these

## Show Answer

**
Area = \frac{base \times (sum \ of \ parallel \ sides)}{2}
**

### Motion due to Gravity

82 The motion of an object falling under the influence of gravity is known as:(a) Uniform motion

(b) Free fall

(c) Circular motion

(d) Rotatory motion

## Show Answer

**
Free fall
**

83 During free fall, the acceleration of the object is:

(a) Zero

(b) Negative

(c) Positive and constant

(d) Positive but varying

## Show Answer

**
Positive and constant
**

84 What is meant by free fall?

(a) Motion of an object along a straight line

(b) Motion of an object under the influence of gravity only

(c) Motion of an object around an axis

(d) Motion of an object in a circular path

## Show Answer

**
Motion of an object under the influence of gravity only
**

85 The equation of motion for an object in free fall due to gravity is:

(a) v_f = v_i + at

(b) s = vi_t + \frac{1}{2}at^2

(c) 2as = v_f^2 - vi_2

(d) h = \frac{1}{2}gt^²

## Show Answer

**
h = \frac{1}{2}gt^²
**

86 Which of the following is true for an object in free fall near the surface of the Earth?

(a) It experiences zero acceleration

(b) Its acceleration is directed upwards

(c) Its acceleration is directed downwards

(d) It experiences uniform motion

## Show Answer

**
Its acceleration is directed downwards
**

87 If a body is falling under the gravity then its gravitational acceleration will be taken as:

(a) Positive

(b) Negative

(c) Zero

(d) None of these

## Show Answer

**
Positive
**

88 If a body is throwing upward, against the gravity then its gravitational acceleration will be taken as:

(a) Positive

(b) Negative

(c) Zero

(d) None of these

## Show Answer

**
Negative
**

89 If a body is throwing upward then its finial velocity at the highest point will be taken as:

(a) Positive

(b) Negative

(c) Zero

(d) None of these

## Show Answer

**
Zero
**

90 The value of ‘g’ at sea level is taken as:

(a) 9.8 m/s^2

(b) 32 ft/s^2

(c) Both (a) and (b)

(d) None of these

## Show Answer

**
Both (a) and (b)
**

## Review Exercise Chapter 2

91. The average speed of a bus is 20 ms^{-1} , how far can it travel in 10s?(a) 100 m

(b) 200 m

(c) 150 m

(d) 250 m

## Show Answer

**
200 m
**

92. A truck accelerates uniformly from 15 ms^{-1} \ to \ 20 ms^{-1} \ in \ 5 s . Whit is the acceleration of the truck?

(a) 2 ms^{-2}

(b) 1.5 ms^{-2}

(c) 1 ms^{-2}

(d) 2.5 ms^{-2}

## Show Answer

**
1 ms^{-2}
**

93. A car moving along a straight line at 20 ms^{-1} under goes an acceleration of 4 ms^{-2} . After 2 s , its speed will be

(a) 28 ms^{-1}

(b) 16 ms^{-1}

(c) 12 ms^{-1}

(d) 8 ms^{-1}

## Show Answer

**
28 ms^{-1}
**

94. A bird begins to accelerate a constant 0.3 m/s^2 \ for \ 3 s. its change in velocity is

(a) 0.9 m/s

(b) 15.m/s

(c) 1.95 m/s

(d) 2.4 m/s

## Show Answer

**
0.9 m/s
**

95. A car is going backward at 5 m/s . After 10 s of uniform acceleration, the car is going forward at 10 m/s . The acceleration is:

(a) 0.5 m/s^2

(b) 0.75 m/s^2

(c) 1.5 m/s^2

(d) 4 m/s^2

## Show Answer

**
1.5 m/s^2
**

96. The slope of distance – time graph represents:

(a) Acceleration

(b) Change in acceleration

(c) Speed

(d) Distance

## Show Answer

**
Speed
**

97. The area under a speed – time graph represents:

(a) Acceleration

(b) Change in acceleration

(c) Distance

(d) Velocity

## Show Answer

**
Distance
**

98. A student is riding his bicycle on a straight flat road covers one block every 7 seconds. If each block is 100m long, he is traveling at:

(a) Constant speed

(b) Constant velocity

(c) 10m/s

(d) Both (a) & (b)

## Show Answer

**
Both (a) & (b)
**

99. You drop a rock from a bridge to the river below. When the rock has fallen 4 m, you drop a second rock. As the rocks continue their free fall, their separation

(a) Increase

(b) Decrease

(c) Stay the same

(d) None of these

## Show Answer

**
Stay the same
**

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