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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

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Class 9 Physics Chapter 2 Notes

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Kinematics SLO Based Notes

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Class 9 Physics SLO Based Chapter 2

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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


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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


Physics Class 9 MCQs (All Chapters)


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