Equilibrium of Rigid Bodies, Rigid Body Rotation and Equations of Rotational Motion NEET Questions

Physics - Rotational Motion

Equilibrium of Rigid Bodies, Rigid Body Rotation and Equations of Rotational Motion MCQ Questions


1.
An ideal rigid body is one in which:
A.
Mass is concentrated at one point
B.
The body cannot rotate
C.
There are no internal forces between particles
D.
The distances between all pairs of particles remain unchanged under the action of forces
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ANSWER :
D. The distances between all pairs of particles remain unchanged under the action of forces
2.
The motion of a rigid body which is NOT pivoted or fixed in any way is in general:
A.
Pure translation only
B.
Pure rotation only
C.
Either pure translation, or a combination of translation and rotation
D.
Always at rest
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ANSWER :
C. Either pure translation, or a combination of translation and rotation
3.
In pure translation of a rigid body, at any instant of time:
A.
All particles have the same velocity
B.
All particles move in circles
C.
The centre of mass is stationary
D.
Different particles have different velocities
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ANSWER :
A. All particles have the same velocity
4.
In rotation of a rigid body about a fixed axis:
A.
All particles have the same linear velocity
B.
Different particles have different angular velocities
C.
Particles on the axis have non-zero velocities
D.
Each particle moves in a circle whose plane is perpendicular to the axis, with centre on the axis
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ANSWER :
D. Each particle moves in a circle whose plane is perpendicular to the axis, with centre on the axis
5.
Which of the following is an example of pure rotation about a fixed axis?
A.
Rolling motion of a cylinder on a plane
B.
A spinning top (not pivoted at any point)
C.
A ceiling fan
D.
Motion of a freely falling body
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ANSWER :
C. A ceiling fan
6.
The motion of a top spinning on its tip (which is itself stationary) is best described as:
A.
Pure translation
B.
Rotation about a fixed axis
C.
Rotation about an axis that itself rotates (precession) — one POINT (the tip) is fixed
D.
Combination of translation and rotation
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ANSWER :
C. Rotation about an axis that itself rotates (precession) — one POINT (the tip) is fixed