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Physics ECAT Pre Engineering Chapter 5 Circular Motion Online Test MCQs With Answers
Question # 1
When a body moves with a constant speed in a circle:
Choose an answer
No work is done on it
No acceleration is produced in the body
Velocity remains constant
None of these
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Question # 2
A rotating body tends to be slower, when its angular acceleration is:
Choose an answer
Positive
Negative
Zero
Infinity
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Question # 3
The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 0.8 m sec
-2
comes out to:
Choose an answer
980 N
580 N
1380 N
Zero
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Question # 4
Einstein's theory about gravity if better than Newton's because it gave explanation of:
Choose an answer
Inverse square law
Bending of light
Both A and B
None of above
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Question # 5
Direction of motion _________ in circular motion
Choose an answer
Changes off and on
Changes continously
Does not change
None of them
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Question # 6
Centripetal acceleration is also called ______ acceleration
Choose an answer
Tangential
Radial
Angular
None of them
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Question # 7
______ plays the same role during angular motion as played by the mass in linear motion
Choose an answer
Torque
Angular Momentum
Moment of a force
Moment of inertia
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Question # 8
When body moves along a circular path with constant speed, it has an acceleration, which is always directed;
Choose an answer
Along the tangent
Towards the centre
Away from the centre
None of them
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Question # 9
Formula for calculating moment of inertia of the bodies of one pair is same. Tick the answer.
Choose an answer
Disc, sphere
sphere, hoop
Thin rod, hoop
Hoop,disc
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Question # 10
Moment of inertia depends upon:
Choose an answer
Mass
Selection of axis of rotation
Both of them
None of these
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Question # 11
Centripetal force performs:
Choose an answer
Maximum work
Negative work
Positive work
None of these
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Question # 12
When a body moves with a constant speed in a circle:
Choose an answer
No work is done on it
No acceleration is produced in the body
Velocity remains constant
None of these
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Question # 13
A body can have constant velocity when it follows:
Choose an answer
A circular path
A rectilinear path
Trajectory of a projectile
None of these
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Question # 14
One radian is equal to:
Choose an answer
30.3
°
45.3
°
50.3
°
57.3
°
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Question # 15
Angular momentum is a:
Choose an answer
vector quantity
Imaginary quantity
Complex Quantity
Scalar Quantity
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Question # 16
Centripetal acceleration is also called ________ acceleration
Choose an answer
Tangential
Radial
Angular
None of these
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