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MDCAT Physics Chapter 3 Rotational and circular motion Online Test MCQs With Answers
Question # 1
The direction of angular velocity is along
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Tangent to the circle
Axis of rotation
Inward the radius
Out ward of the radius
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Question # 2
Torque is necessary for producing.
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angular speed
linear acceleration
angular acceleration
none of these
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Question # 3
In uniform circular motion, the factor that remains constant is
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Linear velocity
Centripetal force
Acceleration
speed
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Question # 4
What happens to the centripetal acceleration of a particle, when its speed is doubled and angular velocity is halved?
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halved
doubled
remain unchanged
becomes four times
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Question # 5
SI unit of kinetic energy of rotation is
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joule second
joule
joule second
joule meter
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Question # 6
A car of 1000kg traveling at 20m/sec rounds a curve of radius 100m. Find the necessary centripetal force
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4 x 10
3
kg m/s
2
3 x 10
3
kg m/s
2
5 x 10
3
kg m/s
2
4.5 x 10
3
kg m/s
2
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Question # 7
Geo stationary satellite remains
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Stationary
Both "A" & "B"
Appear
None of them
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Question # 8
For a particle in uniform circular motion the relation a = r 𝑎 of accelerations hold. The acceleration 'a'
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is centripetal acceleration
Is tangential acceleration
is radical acceleration
both A and B
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Question # 9
A body moving in a circular path with a constant speed has a
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Constant velocity
Constant kinetic energy
Constant acceleration
Constant displacement
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Question # 10
If a car moves with a uniform speed of 2 ms-1 in a circle of radius 0.4m. Its angular speed is
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4 rad. s
-1
1.6 rad. s
-1
5 rad. s
-1
2.8 ms
-1
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Question # 11
The angular analogue of linear displacement is called
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angular velocity
angular displacement
angular momentum
moment of force
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Question # 12
If a rotating body is moving counter clockwise, direction of angular velocity will be
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along linear velocity
towards the center
along the axis of rotation
away from center
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Question # 13
Two artificial satellites of unequal masses are revolving in a circular orbit around the earth with a constant speed. Their time periods:
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Will be different
Will depend on their masses
Will be same
Will depend upon the place of their projection
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Question # 14
In uniform circular motion, the factor that remains constant is:
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Linear velocity
Acceleration
Speed
All of these
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Question # 15
Which statement about geostationary orbit is false?
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A geostationary orbit must be directly above the equator
All satellite in a geostationary orbit must have the same masses
The period of geostationary orbit must be 24 hours
There is only one possible radius for a geostationary
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Question # 16
The force which provides the necessary centripetal force to keep the mud in circular path is called
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cohesive force
adhesive force
frictional force
gravitational force
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Question # 17
When a particle moves in a circle the angle between it linear velocity and the angular velocity is always
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0°
180°
90°
none of them
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Question # 18
A stone attached to one end of a string is revolved around a stick so that the string winds on the stick and gets shortened) What is conserved)
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angular momentum
kinetic energy
linear momentum
none of the above
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Question # 19
The kinetic energy of a body rotating with an angular speed 𝑚 depends on.
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angular speed
distribution of mass
neither (A) nor (B)
both (A) and (B)
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Question # 20
When a particle moves in a uniform circular motion. It has:
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Radial velocity and radial acceleration
Tangential velocity and radial acceleration
Tangential velocity and tangential acceleration
Radial velocity and tangential acceleration
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