Question (1):
1 km/h = _____ m/s
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| Ans: 1 |
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Question (2):
The distance (s) in metres travelled by a particle is related to time (t) in seconds by the equation of motion -S = 10t + 4t2. What is the initial velocity of the body?
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| 1. |
10 m/s
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| 2. |
6 m/s
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| 3. |
4 m/s
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| 4. |
10 m/s2
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| Ans: 1 |
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Question (3):
For the equation - S = 10t + 4t2 what is the acceleration of the body?
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| 1. |
8 m/s2
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| 2. |
10 m/s2
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| 3. |
4 m/s2
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| 4. |
8 m/s
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| Ans: 1 |
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Question (4):
A body moving along a straight line at 20 m/s decelerates at the rate of 4 m/s2. After 2 seconds its speed will be equal to
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| 1. |
8 m/s
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| 2. |
12 m/s
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| 3. |
16 m/s
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| 4. |
- 12 m/s
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| Ans: 2 |
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Question (5):
Give the equation of motion connecting u, v, a and s where the symbols have their usual meaning
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v = u + at
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| 3. |
v2 - u2 = 2aS
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| Ans: 3 |
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Question (6):
An object moving with a speed of 5 m/s comes to rest in 10 s, after the brakes are applied. What is the initial velocity?
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| 1. |
zero
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| 2. |
5 m/s
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| 3. |
15 m/s
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| 4. |
50 m/s
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| Ans: 2 |
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Question (7):
A body moving along a straight line at 40 m/s undergoes an acceleration of 4 m/s2. After 10 seconds its speed will be
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| 1. |
20 m/s
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| 2. |
28 m/s
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| 3. |
16 m/s
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| 4. |
80 m/s
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| Ans: 4 |
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Question (8):
SI unit of acceleration is __________.
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| Ans: 1 |
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Question (9):
Retardation is __________.
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| 1. |
negative acceleration
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| 2. |
positive acceleration
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| 3. |
uniform acceleration
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| 4. |
variable acceleration
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| Ans: 1 |
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Question (10):
When an object is moving with uniform velocity, what is its acceleration?
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zero
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| 2. |
uniform
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| 3. |
non-uniform
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| 4. |
negative
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| Ans: 1 |
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Question (11):
In the case of a rectilinear uniform motion, distance-time graph is a
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parabola
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| 2. |
straight line
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| 3. |
curved line
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| 4. |
rectangle
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| Ans: 2 |
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Question (12):
Speed of 90 km/h when expressed in m/s is .
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| 1. |
2.5
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| 2. |
25
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| 3. |
250
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| 4. |
90000
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| Ans: 2 |
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Question (13):
When a graph of one quantity versus another results in a straight line, the quantities are .
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directly proportional
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| 2. |
constant
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inversely proportional
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independent of each other
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| Ans: 1 |
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Question (14):
What does the following S-t graph indicate?
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| 1. |
uniform speed
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body is at rest
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| 3. |
non-uniform speed
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| 4. |
variable speed
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| Ans: 2 |
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Question (15):
What do you infer, if S-t graphs of two cyclists meet at a point?
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They collide
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They pass each other
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They are at rest
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They are starting from rest
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| Ans: 2 |
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Question (16):
Name the physical quantity which we get from a S-t graph.
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| 1. |
Speed
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| 2. |
Displacement
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| 3. |
Distance
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| 4. |
Time
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| Ans: 1 |
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Question (17):
What is the SI unit of speed?
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| 1. |
km/h
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| 2. |
m/s
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| 3. |
m/min
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| 4. |
km/s
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| Ans: 2 |
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Question (18):
What is the distance covered by a car in 5 h if it is moving with a speed of 35 km/h?
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| 1. |
175 km
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| 2. |
150 km
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| 3. |
7 km
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| 4. |
1750 km
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| Ans: 1 |
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Question (19):
The S-t graph for uniform speed is
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| Ans: 2 |
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Question (20):
The average speed of a car which covers half the distance with a speed of 20 m/s and other half with a speed of 30 m/s in equal intervals of time is _________.
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| 1. |
25 m/s
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| 2. |
0 m/s
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| 3. |
24 m/s
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| 4. |
2.4 m/s
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| Ans: 1 |
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Question (21):
Displacement is a ________ quantity.
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| 1. |
scalar
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| 2. |
vector
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| 3. |
derived
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| 4. |
linear
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| Ans: 2 |
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Question (22):
km / h2 is a unit of ________ .
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| 1. |
velocity
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| 2. |
speed
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| 3. |
acceleration
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| 4. |
distance
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| Ans: 3 |
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Question (23):
The speed-time graph for a particle moving at constant speed is a straight-line ________ to the time axis.
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parallel
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perpendicular
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aligned
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| 4. |
inclined
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| Ans: 1 |
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Question (24):
When an object moves in a fixed direction with uniform acceleration, the speed-time graph is a ________.
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parabola
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straight line
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| 3. |
ellipse
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curve
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| Ans: 2 |
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Question (25):
The area under the speed-time graph gives the ________.
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| 1. |
distance
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| 2. |
velocity
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| 3. |
time
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| 4. |
acceleration
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| Ans: 1 |
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Question (26):
A speed of 90 km/h, expressed in cm s-1 is ________.
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| 1. |
2.5
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| 2. |
2500
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| 3. |
300
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| 4. |
90
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| Ans: 2 |
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Question (27):
When an object of mass 5 kg starts from rest, what is its initial velocity?
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| 1. |
0
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| 2. |
- 5 m/s
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| 3. |
variable
5
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| 4. |
1 m/s
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| Ans: 1 |
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Question (28):
Identify the v- t graph representing uniform velocity.
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| Ans: 2 |
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Question (29):
Name the physical quantity that is defined as the rate of change of displacement.
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| 1. |
velocity
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| 2. |
acceleration
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| 3. |
distance
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| 4. |
speed
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| Ans: 1 |
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Question (30):
An object moves with a constant velocity of 9.8 m/s, its acceleration in m s-2 is ________.
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| 1. |
9.8 m/s2
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| 2. |
zero
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| 3. |
0.98 m/s
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| 4. |
98 m/s2
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| Ans: 2 |
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Question (31):
In 12 minutes a car whose speed is 35 km/h travels a distance of
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| 1. |
7 km
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| 2. |
3.5 km
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| 3. |
14 km
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| 4. |
28 km
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| Ans: 1 |
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Question (32):
A body moving along a straight line at 20 m/s undergoes an acceleration of 4 m/s2. After two seconds its speed will be ________.
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| 1. |
8 m/s
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| 2. |
12 m/s
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| 3. |
16 m/s
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| 4. |
28 m/s
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| Ans: 4 |
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Question (33):
A car increases its speed from 20 km/h to 50 km/h in 10 seconds. Its acceleration is ________.
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| 1. |
30 m/s2
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| 2. |
3 m/s2
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| 3. |
18 m/s2
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| 4. |
0.83 m/s2
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| Ans: 4 |
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Question (34):
When the distance covered by an object is directly proportional to time, it is said to travel with ________.
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zero velocity
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| 2. |
constant speed
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| 3. |
constant acceleration
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| 4. |
uniform acceleration
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| Ans: 2 |
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Question (35):
Negative acceleration means an object is moving with ________ .
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| 1. |
increasing speed
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| 2. |
decreasing speed
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| 3. |
uniform speed
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| 4. |
constant speed
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| Ans: 2 |
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Question (36):
Motion along a straight line is called __________ motion.
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| 1. |
rectilinear motion
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| 2. |
circular motion
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| 3. |
oscillatory motion
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| 4. |
parabolic
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| Ans: 1 |
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Question (37):
Distance-time graph is a straight line for __________ motion.
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| 1. |
variable
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| 2. |
non uniform
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| 3. |
rectilinear
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| 4. |
circular
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| Ans: 3 |
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Question (38):
A car is moving with a speed of 36 km/h. Its speed in m/s is _______.
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| Ans: 1 |
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Question (39):
A car starts from rest and covers a distance of 100 m in one second with uniform acceleration. Its acceleration is _________.
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| 1. |
100 m/s2
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| 2. |
50 m/s2
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| 3. |
200 m/s2
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| 4. |
100 m/s
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| Ans: 1 |
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Question (40):
Which of the following is a vector quantity?
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| 1. |
area
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| 2. |
length
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| 3. |
distance
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| 4. |
displacement
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| Ans: 4 |
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Question (41):
The slope of a v-t graph gives ________.
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| 1. |
acceleration
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| 2. |
velocity
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| 3. |
speed
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| 4. |
distance
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| Ans: 3 |
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Question (42):
The physical quantity describing motion and whose measure is the product of distance travelled and the time taken to travel that distance is ________.
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| 1. |
speed
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| 2. |
mass
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| 3. |
weight
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| 4. |
displacement
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| Ans: 1 |
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Question (43):
If you are travelling with a velocity of 25 m/s, how long will you take to travel 700 m?
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| 1. |
25 s
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| 2. |
28 s
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| 3. |
25 min
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| 4. |
2.8 s
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| Ans: 2 |
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Question (44):
Name the instrument used to measure instantaneous speed of a vehicle.
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| 1. |
accelerator
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| 2. |
speedometer
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| 3. |
ammeter
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| 4. |
multimeter
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| Ans: 2 |
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Question (45):
A body covers a distance S in time t. What is its speed?
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| 1. |
S/t
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| 2. |
t/S
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| 3. |
S x t
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| 4. |
Zero
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| Ans: 1 |
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