Centre of the Mass (Two-Particle System, Rigid Body) NEET Questions

Physics - Rotational Motion

Centre of the Mass (Two-Particle System, Rigid Body) MCQ Questions


13.
If a rigid body moves with pure translation, then:
A.
All particles have different velocities
B.
All particles have the same velocity
C.
Only a few particles have the same velocity
D.
No relation to motion
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ANSWER :
B. All particles have the same velocity
14.
The center of mass of a uniform triangular lamina is located at:
A.
Centroid
B.
The base
C.
On one vertex
D.
On the centroid
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ANSWER :
A. Centroid
15.
Which of the following is not required to determine the center of mass?
A.
Mass distribution
B.
Only position
C.
Only mass
D.
Both mass and position
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ANSWER :
D. Both mass and position
16.
In the center of mass frame of reference, the total momentum of the system is:
A.
Zero
B.
Constant
C.
Infinity
D.
Equal to total mass
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ANSWER :
B. Constant
17.
The center of mass of a thin homogeneous rod lies at:
A.
Midpoint
B.
One-third from either end
C.
One-fourth from one end
D.
At one end
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ANSWER :
A. Midpoint
18.
Which of these is true for the motion of a rigid body?
A.
Only its rotation matters
B.
Both translation and rotation matter
C.
Rotation dominates
D.
Depends on external forces
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ANSWER :
C. Rotation dominates