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