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.
A uniform rod of length 2 m and mass 3 kg is bent to form an equilateral triangle. The distance of the center of mass of the triangle from its center is:

NEET - 2019

A.
0.5 m
B.
0.6 m
C.
0.7 m
D.
0.8 m
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ANSWER :
A. 0.5 m
15.
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
16.
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
17.
A system consists of two particles each of mass 1 kg located at (0, 0) and (1, 0) respectively. The center of mass of the system is located at:

NEET - 2021

A.
(0.5, 0)
B.
(1, 0)
C.
(0, 1)
D.
(0.5, 0.5)
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ANSWER :
A. (0.5, 0)
18.
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