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PPSC Physics Chapter 1 MECHANICS MCQs With Answers
Question # 1
The are between the velocity time graph and the time axis is numerically equal to.
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Distance moved by the object
Speed of the object
Velocity of the object
Acceleration of the object
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Question # 2
The product of force and duration of impact is called.
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Density
Momentum
Torque
Impulse
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Question # 3
If the average velocity of an object is zero in some time internal the displacement of the object for that intercanal will be.
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Infinite
zero
Increase
Decreasing
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Question # 4
Which vector gives the displacement from one point another in space.
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Null vector
Position vector
Unit vector
Distance vector
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Question # 5
The horizontal range is equal for the angles.
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30
o
and 45
o
30
o
and 60
o
45
o
and 90
o
60
o
and 75
o
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Question # 6
If there are no frictional effects, the mechanical energy of a system executing simple harmonic motion.
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Changes with time
Is variable
Is constant
Is not conserved
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Question # 7
The magnitude of the resultant of two forces may be increased by
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Increasing the angle between them
Decreasing the angle between them
Drawing the parallelogram to represent them
Drawing the force perpendicularly
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Question # 8
A force of 10 N is acting along z-axis, its component along x -axis and y-axis is
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2 N , 8 N
3 N, 7 N
5 N each
Zero
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Question # 9
Which of the following pair of physical quantities have the same dimension.
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Momentum and pressure
Energy and work
Linear and angular momentum
Force and surface tenstion
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Question # 10
A ball mass 0.25 kg is thrown to a height of 20 m The change in G.P.E is
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49 J
50 J
-75 J
500 J
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Question # 11
A body of mass 2 kg attached to a spring is pulled to a distance of 4 cm What will be the value of spring constant K.
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490 N m-1
980 N m-1
1260 N m-1
1960- N m-1
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Question # 12
Linear acceleration of a point moving in a circle of radius 30 cm with angular acceleration of 0.5 rad s-2 is
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1.5 cm s-2
2.5 cm s-2
10 cm s-1
15 cm s-2
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Question # 13
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 # 14
The centre of gravity of a cylinder is.
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At the intersection of medians
At the centre
At the middle point of axis
At the intersection of diagonals
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Question # 15
A man of mass 100 kg is standing in an elevator. The net force acting on the man reads its weight when the elevator is going up with acceleration 4 m s-2 would be.
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100 N
590 N
490 N
980 N
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Question # 16
The consumption of energy by a 60 W bulb in 2 s is
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0.02 J
30 J
60 J
120 J
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Question # 17
Angular acceleration is produced due to
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Centripetal force
Torque
Force
Mass
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Question # 18
Which of the following is SI base unit for temperature.
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Celsius
Kelvin
Fahrenheit
Rankine
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Question # 19
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 # 20
A 10 kg rocket fragment falling towards the earth has a net downward acceleration of 5 ms -2 The net downward force acting on the fragment is
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5 N
10 N
50 N
105 N
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Question # 21
A 100 kg box is pulled 10 m across a frictionless horizontal surface by a 50 N force The change in the P.E. of the box a
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0 J
2 J
20 J
50 J
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