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PPSC Physics Chapter 1 MECHANICS MCQs With Answers
Question # 1
The escape velocity from the earth's surface is
Choose an answer
1.2 km s-1
1.7 km s-1
10.2 km s-1
11.2 km s-1
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Question # 2
Which of the following is not a unit of plane angle.
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Degree
Radian
Gradian
Steradian
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Question # 3
If a planet of mass double than that of the earth and radius three times greater than the earth a 10 kg mass on its surface will weight.
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2.2 N
4.4 N
6.7 N
13.2 N
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Question # 4
Which statement for geostationary orbit is false.
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A geostationary orbit must be directly above the equator
All satellites in a geostationary orbit must have the same mass
The period of a geostationary orbit must be 24 hours
There is only one possible radius for geostationary orbit
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Question # 5
Acceleration due to gravity is not affected by which one of the following
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Latitude
Attitude
Longitude
Depth
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Question # 6
92.65 is round off as
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92.6
93.00
92.7
None of these
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Question # 7
Which one of the following does not have the same dimenstions.
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Energy ,work, heat
Pressure, stress, Young's modulus
Voltage, electromotive force, potential difference
Electric flux, electric field, electric dipole moment
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Question # 8
Frequency of second pendulum is.
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0.5 Hz
1.0 Hz
1.5 Hz
2.0 Hz
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Question # 9
In any collision between two bodies there need nor the conservation of
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Linear momentum
Angular momentum
Total energy
Kinetic energy
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Question # 10
The moment of linear momentum is called.
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Torque
Couple
Impulse
Angular momentum
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Question # 11
A force of 50 N acts on a body for 10 s What will be change in momentum.
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5 Ns
500 Ns
200 Ns
800 N s
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Question # 12
What is the period of geostationary satellite.
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6 hours
12 hours
18 hours
24 hours
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Question # 13
When two vectors have opposite directions we say that they are
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Parallel
Antiparallel
Perpendicular
Out of phase
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Question # 14
Unit vector of a vector A describes
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Magnitude of a given vector
Direction of given vector
Shape of a given vector
Magnitude and direction of a given vector
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Question # 15
An object travels at constant speed around a circle of radius 1.0 m in 1.0 s the magnitude of its acceleration is.
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zero
1.0 m s-2
2 m s-2
4 pi2 m s-2
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Question # 16
If two non zero vectors are perpendicular to each other than their scalar product is equal to
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1
-1
0
infinity
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Question # 17
The time period of a simple pendulum is independent of its.
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Length
Mass
Acceleration due to gravity
Restoring force
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Question # 18
The process where by energy is dissipated from the oscillating system is called.
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Resonance
Damping
Forced oscillation
Free oscillation
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Question # 19
Which of the following is renewable source of energy.
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Oil
Natural gas
Uranium
Sunlight
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Question # 20
The path of projectile is maximum at
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Point of lauch
Highest point
Point of landing
Both a and c
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Question # 21
If velocity is doubled then
Choose an answer
Momentum increase 4 time and K.E. increase 2 times
Momentum increases 2 times and K.E. remains constant
Momentum increases 2 times and K.E. increases 4 times
Both momentum and K.E. remain constant
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