MOTION & LAWS OF MOTION
CHAPTER-3
TEST-1
1.Acceleration can be defined as the change in velocity per unit _______.
a) Displacement
b) Distance
c) Time
d) Area
c) Physical
d) Chemical
2.Impulse
of a force is _______ quantity:
a) Vector
b) Scalar c) Physical
d) Chemical
3.If the velocity of a body is
decreasing, the acceleration is:
a)
Positive
b) Negative
c) Zero
d) None of the above
4.The acceleration due to gravity is
denoted by:
a) G
b) g
c) a
d) h
c) Increased
d) Decreased
c) Non-isolated
d) Physical
5.Due
to the application of impulse during the collision between the bodies, the
momentum is:
a) Changed
b) Remain constant c) Increased
d) Decreased
6.A
group of objects whose mutual interaction is much greater than their
interaction with other
objects can
frequently be treated as:
a) Isolated
b) Disturbed c) Non-isolated
d) Physical
7.The average acceleration during any
interval of time is equal to the instantaneous acceleration
when the body is moving with:
when the body is moving with:
a)
Uniform velocity
b) Uniform acceleration
c) Constant speed
d) Negative acceleration
8.“A body continues its state of rest
or uniform motion unless acted upon by an unbalanced force”.
This is the:
This is the:
a) Law
of gravitation
b) Third law of motion
c) Second law of motion
d) First law of motion
9.The property of a body that opposes
any change in its state of rest or motion is called its:
a) Inertia
b) Mass
c) Force
c) Force
d) Energy
10.Mass is the quantity of _______ in a
body.
a) Energy
b) Inertia
c) Weight
d) Matter
c) Weight
d) Matter
11.The agent that causes a change in the
state of rest or motion of a body is known as:
a) Torque
b) Moment of inertia
c) Force
d) Energy
c) Force
d) Energy
12.A moving car whose engine is switched
off, comes to rest after some time due to:
a) Inertia
b) Its Mass
c) Friction
d) Earth’s gravitation
c) Friction
d) Earth’s gravitation
13.According to the second law of
motion, acceleration is proportional to:
a) Force
b) Time
c) Mass
d) Distance
c) Mass
d) Distance
14. The mathematical form of Newton’s
second law of motion is:
a) m = a/F
b) m = Fa
c) F = m/a
d) F = ma
15.One Newton is a force that produces
an acceleration of 1/2 m/s2 in a body of mass:
a) 1 kg
b) 2 kg
c) 4 kg
d) 8 kg
16.An inertial frame of reference is one
whose:
a) Acceleration is zero
b) Velocity is changing with time
c) Acceleration is uniform
d) Inertia is not zero
17.According to the third law of motion,
every action causes a reaction which is _______ to it.
a) Opposite and equal
b) In the same direction and equal
c) Opposite but double in magnitude
d) In any
direction but equal
c) Force
d) Speed
c) Adiabatic system
d) Enclosed system
c) Its momentum changes with distance
d) Its momentum is conserved
c) The momentum is constant
d) Some force acts
c) Equal to
d) Varies continuously with
18.It
is difficult to stop a body moving with a greater velocity than another body
which is moving with a lesser
velocity. This is due to:
a) Acceleration
b) Momentum c) Force
d) Speed
19.A
system of particles, on which no external force acts though the particles of
the system interact with each
other, is called an:
a) Isobaric system
b) Isolated system c) Adiabatic system
d) Enclosed system
20.If
no unbalanced force acts on the system then:
a) Its momentum is a function of time
b) Its momentum is not a function of time c) Its momentum changes with distance
d) Its momentum is conserved
21.If
the rate of change of momentum with respect to time is zero, then:
a) The momentum is a function of time
b) The momentum is not conserved c) The momentum is constant
d) Some force acts
22.The
rate of change of momentum is _______ the force acting on it:
a) Greater
b) Smaller than c) Equal to
d) Varies continuously with
23.Linear momentum of a body is the
product of its:
a) Mass and acceleration
b) Mass and velocity
c) Force and mass
d) Energy and time
24.The impulse of a force is the product
of:
a) Force and time
b) Force and velocity
c) Force and mass
d) Energy and mass
25.Force can also be defined as the rate
of change of:
a) Energy
b) Velocity
c) Momentum
d) Inertia
26.The total linear momentum of a system
remains constant if:
a) No external force is acting upon it
b) It has no energy
c) It is freely falling under gravity
d) No frictional force is present
c) Greater than W
d) Not settled by data
27.A
block has weight ‘W’ and it held against a vertical wall by applying a
horizontal
force ‘F’. Then minimum value
of ‘F’ is:
a) Less than W
b) Equal W c) Greater than W
d) Not settled by data
28.Elastic collision is that collision
during which:
a) Momentum is conserved
b) Energy is conserved
c) Mass is conserved
d) Angular momentum is conserved
29.Impulse can be defined as the change
in _______ of a body by an impulsive force.
a) Velocity
b) Momentum
c) Energy
d) Acceleration
30.When a number of bodies are such that
they can exert force upon one another and
no external agency exerts a force on them, they are said to form:
no external agency exerts a force on them, they are said to form:
a) An isolated system
b) An inertial frame of reference
c) Non-inertial frame of reference
d) None of the above
CORRECT ANSWER
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1.
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C
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11
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C
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21
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D
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2.
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A
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12
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C
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22
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C
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3
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B
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13
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A
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23
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B
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4
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B
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14
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D
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24
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A
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5
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A
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15
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B
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25
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C
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6
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A
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16
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A
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26
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A
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7
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B
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17
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A
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27
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D
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8
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D
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18
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B
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28
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A
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9
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A
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19
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B
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29
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B
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10
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D
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20
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D
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30
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A
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