Question (1):
Inertia is ________
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| 1. |
a property of matter
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| 2. |
a type of force
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| 3. |
the speed of an object
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| 4. |
none of the above
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| Ans: 1 |
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Question (2):
A and B are two objects with masses 100 kg and 75 kg respectively, then ________ .
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| 1. |
both will have the same inertia
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| 2. |
B will have more inertia
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| 3. |
A will have more inertia
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| 4. |
both will have less inertia
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| Ans: 3 |
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Question (3):
The resultant of balanced forces is ________
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| 1. |
non zero
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| 2. |
equal to zero
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| 3. |
not equal to zero
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| 4. |
equal to the acceleration produced in the body
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| Ans: 2 |
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Question (4):
The physical quantity, which is the measure of inertia, is ________
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| 1. |
density
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| 2. |
weight
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| 3. |
force
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| 4. |
mass
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| Ans: 4 |
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Question (5):
The sparks produced during sharpening of a knife against a grinding wheel leaves the rim of the wheel tangentially. This is due to ________
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| 1. |
inertia of rest
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| 2. |
inertia of motion
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| 3. |
inertia of direction
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| 4. |
force applied
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| Ans: 3 |
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Question (6):
The law that gives a qualitative definition of force is ________
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| 1. |
Newton's second law of motion
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| 2. |
Law of inertia
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| 3. |
Newton's third law of motion
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| 4. |
Law of gravitation
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| Ans: 2 |
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Question (7):
Name the property of matter due to which a body continues in its state of rest or uniform motion unless an external force acts on it.
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| 1. |
Inertia
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| 2. |
Elasticity
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| 3. |
Viscosity
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| 4. |
Density
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| Ans: 1 |
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Question (8):
The S.I. unit of force is
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| 1. |
erg
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| 2. |
joule
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| 3. |
newton
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| 4. |
dyne
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| Ans: 3 |
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Question (9):
When a force of 1N acts on a mass of 1kg that is free to move, the object moves with
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| 1. |
a speed of 1 m/s
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| 2. |
a speed of 1 km/s
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| 3. |
an acceleration 10 m/s2
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| 4. |
an acceleration of 1 m/s2
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| Ans: 4 |
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Question (10):
The acceleration in a body is due to
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| 1. |
balanced force
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| 2. |
unbalanced force
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| 3. |
mass
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| 4. |
electrostatic force
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| Ans: 2 |
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Question (11):
When an object undergoes acceleration
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| 1. |
its speed always increases
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| 2. |
its velocity always increases
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| 3. |
it always falls towards the Earth
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| 4. |
a force always acts on it
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| Ans: 4 |
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Question (12):
A force of 10 N is acting on an object of mass 10 kg. What is the acceleration produced in it?
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| 1. |
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| 2. |
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| 3. |
100 m/s2
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| 4. |
100 m/s
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| Ans: 1 |
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Question (13):
What is the force acting on an object of mass 10 kg moving with a uniform velocity of 10 m/s ?
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| 1. |
100 N
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| 2. |
10 N
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| 3. |
0
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| 4. |
1 N
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| Ans: 3 |
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Question (14):
An athlete can take a longer jump if he comes running from a distance as compared to that when he jumps suddenly. Identify the type of inertia.
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| 1. |
Inertia of rest
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| 2. |
Inertia of motion
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| 3. |
Inertia of direction
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| 4. |
Inertia of position
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| Ans: 2 |
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Question (15):
1 newton = ________
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| Ans: 2 |
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Question (16):
The physical quantity, which is equal to change in momentum, is
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| 1. |
force
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| 2. |
impulse
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| 3. |
acceleration
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| 4. |
velocity
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| Ans: 2 |
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Question (17):
The physical quantity, which is equal to rate of change of momentum, is
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| 1. |
displacement
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| 2. |
acceleration
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| 3. |
force
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| 4. |
impulse
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| Ans: 3 |
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Question (18):
1kg m/s = _________.
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| 1. |
1 N s
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| 2. |
1 N
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| 3. |
1 N m
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| 4. |
10 N s
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| Ans: 1 |
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Question (19):
An example for a vector quantity is __________
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| 1. |
speed
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| 2. |
momentum
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| 3. |
distance
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| 4. |
length
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| Ans: 2 |
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Question (20):
Impulse = _________.
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| Ans: 2 |
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Question (21):
SI unit of impulse is ___________.
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| 1. |
N s
N s
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| 2. |
N s2
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| 3. |
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| 4. |
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| Ans: 1 |
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Question (22):
The momentum of a toy bus of 0.01 kg moving with a velocity of 5 m/s is
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| 1. |
0.005 kg m/s
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| 2. |
0.05 kg m/s
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| 3. |
0.005 N s
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| 4. |
0.5 kg m/s
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| Ans: 2 |
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Question (23):
The product of mass and velocity is known as ____________ .
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| 1. |
acceleration
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| 2. |
force
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| 3. |
momentum
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| 4. |
velocity
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| Ans: 3 |
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Question (24):
What is the momentum of a man of mass 100 kg when he walks with a uniform velocity of 2 m/s?
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| Ans: 1 |
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Question (25):
The two factors on which the momentum of a body depends are ______ and _________ .
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| 1. |
velocity, time
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| 2. |
mass, weight
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| 3. |
mass, distance
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| 4. |
mass,velocity
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| Ans: 4 |
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Question (26):
The gravitational force of earth acting on a body of mass 1 kg is _______.
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| 1. |
8.9 N
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| 2. |
9.8 N
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| 3. |
980 N
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| 4. |
1 N
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| Ans: 2 |
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Question (27):
Momentum of a massive object at rest is _______.
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| 1. |
very large
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| 2. |
very small
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| 3. |
zero
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| 4. |
none of the above
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| Ans: 3 |
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Question (28):
The resultant of action and reaction forces is _______.
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| 1. |
greater than zero
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| 2. |
less than zero
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| 3. |
zero
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| 4. |
none of the above
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| Ans: 1 |
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