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


1.
What is the position of the center of mass of a two-particle system?
A.
Always at the midpoint of the line joining the two masses, regardless of their values
B.
Always lies on the line joining the two masses, closer to the heavier mass, at a point dividing the line in the inverse ratio of the masses
C.
Always coincides exactly with the position of the heavier mass
D.
Independent of the masses; depends only on the distance between them
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ANSWER :
B. Always lies on the line joining the two masses, closer to the heavier mass, at a point dividing the line in the inverse ratio of the masses
2.
If two masses are equal in a two-particle system, the center of mass is located at:
A.
The midpoint between them
B.
One-third the distance from either mass
C.
At one-fourth the distance from the heavier mass
D.
At the position of one of the two masses
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ANSWER :
A. The midpoint between them
3.
Which of the following is true about the center of mass of a system?
A.
It always coincides with the geometric center
B.
It can be outside the body
C.
It is always inside the system
D.
It is independent of mass distribution
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ANSWER :
B. It can be outside the body
4.
For a system of particles, the center of mass moves as if:
A.
Only due to internal forces
B.
Only due to external forces
C.
As if all the mass were concentrated at one point
D.
It is always at rest
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ANSWER :
C. As if all the mass were concentrated at one point
5.
A system of two particles of unequal mass is rotating about their center of mass. The heavier particle:
A.
Stops periodically
B.
Moves faster
C.
Moves slower
D.
Remains at rest
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ANSWER :
C. Moves slower
6.
In the absence of external forces, the motion of the center of mass of a system is:
A.
Parabolic
B.
Linear
C.
Circular
D.
Elliptical
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ANSWER :
B. Linear
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