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 m

B.

0.6 m

C.

0.7 m

D.

0.8 m

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ANSWER :

A. 0 m

15.

The center of mass of a uniform triangular lamina is located at:

A.

Centroid

B.

The base

C.

On one vertex

D.

At the midpoint of one side

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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 :

A. Zero