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

Physics - Rotational Motion
Centre of the Mass (Two-Particle System, Rigid Body)

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


13.
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
14.
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 :
A. Zero
15.
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
16.
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 :
B. Both translation and rotation matter
17.
A body moves in such a way that its center of mass remains fixed. Which of the following is true?
A.
The system is in equilibrium
B.
It cannot move
C.
It must be accelerating
D.
It is in uniform motion
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ANSWER :
A. The system is in equilibrium
18.
A particle is placed at the center of a uniform spherical shell of mass M. The net gravitational force on the particle due to the shell is:
A.
Zero
B.
Same as other particles
C.
Greater than any other point
D.
Undefined
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ANSWER :
A. Zero
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