Class 9 Physics Chapter 2
Updated: 15 Oct 2023
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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
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
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Mechanics
2 The study of motion without the reference of force is said to be:
(a) Kinematics
(b) Mechanics
(c) Dynamics
(d) Motion
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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
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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
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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
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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
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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
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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
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Random motion
9 Motion of gas molecules is an example of:
(a) Rectilinear motion
(b) Curvilinear motion
(c) Rotational motion
(d) Random motion
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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
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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
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Vibrational motion
12 The motion of swing is an example of:
(a) Curvilinear motion
(b) Translatory motion
(c) Rotational motion
(d) Vibrational motion
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Vibrational motion
Position
13 …………….. is the location of object relative to some reference.(a) Distance
(b) Length
(c) Position
(d) None of these
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Position
Rest and Motion are Relatives
14 Rest and motion are …………. states.(a) Relative
(b) Absolute
(c) Constant
(d) All of these
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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
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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
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Vectors
17 Which of the following is a scalar quantity?
(a) Velocity
(b) Time
(c) Displacement
(d) Acceleration
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Time
18 Which of the following is a vector quantity?
(a) Temperature
(b) Mass
(c) Time
(d) Displacement
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Displacement
19 Force is an example of ……………. quantity?
(a) Scalar
(b) Vector
(c) Both (a) and (b)
(d) None of these
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Vector
20 Time is an example of ……………. quantity?
(a) Scalar
(b) Vector
(c) Both (a) and (b)
(d) None of these
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Scalar
Distance
21 The length of a path traveled between two positions is called(a) Velocity
(b) Acceleration
(c) Distance
(d) Retardation
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Distance
22 Which of the following is a scalar quantity?
(a) Distance
(b) Displacement
(c) Velocity
(d) Acceleration
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Distance
23 The unit of distance is
(a) Newton
(b) Meter
(c) Pascal
(d) Joule
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Meter
Displacement
24 The shortest distance between two points is known as(a) Distance
(b) Displacement
(c) Velocity
(d) Acceleration
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Displacement
25 Displacement is a ……………..quantity.
(a) Scalar
(b) Vector
(c) Tensor
(d) None of these
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Vector
26 The unit of displacement is
(a) Newton
(b) Meter
(c) Pascal
(d) Joule
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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
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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
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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
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meters per second (m/s)
30 Speed is a ……………..quantity.
(a) Scalar
(b) Vector
(c) Tensor
(d) None of these
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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
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Speed = \frac{Distance}{Time}
32 Speed is denoted by:
(a) F
(b) s
(c) v
(d) d
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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
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Uniform speed
34 Total distance divided by total time refers to
(a) Average speed
(b) Instantaneous speed
(c) Uniform speed
(d) Variable speed
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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
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Instantaneous speed
36 The speedometer of a car indicates its:
(a) Average speed
(b) Instantaneous speed
(c) Uniform speed
(d) Variable speed
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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
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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
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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
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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
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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
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meters per second (m/s)
42 Velocity is a ……………..quantity.
(a) Scalar
(b) Vector
(c) Tensor
(d) None of these
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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
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Velocity = \frac{Displacement}{Time}
44 Velocity is denoted by:
(a) F
(b) s
(c) v
(d) d
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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
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Instantaneous velocity
46 Total displacement divided by total time refers to
(a) Average velocity
(b) Instantaneous velocity
(c) Uniform velocity
(d) Variable velocity
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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
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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
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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
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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
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50 meters north
Acceleration
51 The rate of change in velocity is known as(a) Velocity
(b) Speed
(c) Acceleration
(d) Displacement
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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
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meters per second (m/s^2)
53 Acceleration is a ……………..quantity.
(a) Scalar
(b) Vector
(c) Tensor
(d) None of these
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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
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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
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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
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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
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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
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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
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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
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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
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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
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Distance-time graph
64 In a distance-time graph, the slope represents:
(a) Speed
(b) Velocity
(c) Time
(d) Acceleration
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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
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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
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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
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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
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Speed-time graph
69 In a speed-time graph, the slope represents:
(a) Speed
(b) Velocity
(c) Time
(d) Magnitude of Acceleration
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Magnitude of Acceleration
70 In a speed-time graph, the area under the curve represents:
(a) Speed
(b) Distance
(c) Time
(d) Displacement
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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
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Velocity-time graph
72 In a velocity-time graph, the slope represents:
(a) Speed
(b) Velocity
(c) Time
(d) Acceleration
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Acceleration
73 In a velocity-time graph, the area under the curve represents:
(a) Speed
(b) Distance
(c) Time
(d) Displacement
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Displacement
Equations of Motion
74 There are …………. equations of motion.(a) 2
(b) 3
(c) 4
(d) 5
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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
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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
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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
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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
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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
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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
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Free fall
83 During free fall, the acceleration of the object is:
(a) Zero
(b) Negative
(c) Positive and constant
(d) Positive but varying
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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
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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
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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
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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
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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
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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
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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}
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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
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1.5 m/s^2
96. The slope of distance – time graph represents:
(a) Acceleration
(b) Change in acceleration
(c) Speed
(d) Distance
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Speed
97. The area under a speed – time graph represents:
(a) Acceleration
(b) Change in acceleration
(c) Distance
(d) Velocity
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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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