Basic Concepts of Rotational Motion NEET Questions

Physics - Rotational Motion

Basic Concepts of Rotational Motion MCQ Questions


7.
If the angular velocity of a rotating body is doubled, its kinetic energy:
A.
Remains the same
B.
Doubles
C.
Quadruples
D.
Halves
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ANSWER :
C. Quadruples
8.
A disc and a ring of the same mass and radius roll down an incline. Which one reaches first?
A.
Ring
B.
Disc
C.
Same time
D.
None
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ANSWER :
B. Disc
9.
The torque acting on a particle is given by:
A.
Force × distance
B.
Force × radius
C.
m × v
D.
None of the above
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ANSWER :
C. m × v
10.
The total kinetic energy of a rolling body is:
A.
Pure rotational
B.
Pure translational
C.
Combination of translation and rotation
D.
Only rotational
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ANSWER :
C. Combination of translation and rotation
11.
Which of the following remains constant in pure rolling motion?
A.
Linear velocity
B.
Angular velocity
C.
Torque
D.
Acceleration
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ANSWER :
B. Angular velocity
12.
The angular momentum of a system remains constant if:
A.
If net external force is zero
B.
If net external torque is zero
C.
If angular acceleration is zero
D.
If moment of inertia is constant
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ANSWER :
B. If net external torque is zero