Rotational MotionRotational Kinetic Energy (NEET (NTANational Eligibility cum Medical Entrance Test) Physics): Questions 1  4 of 6
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Question number: 1
» Rotational Motion » Rotational Kinetic Energy
Question
Two disc, each having moment of inertia 5 kg m ^{2} about its central axis, rotating with speeds 10 rad s ^{1} and 20 rad s ^{1}, are brought in contact face with their axes of the rotation coincided. The loss of kinetic energy in the process is,
Choices
Choice (4)  Response  

a.  125 J 

b.  5 J 

c.  0 J 

d.  2 J 

Question number: 2
» Rotational Motion » Rotational Kinetic Energy
Question
A sphere is rolling without slipping on a horizontal plane. The ratio of its rotational kinetic energy and translation kinetic energy is,
Choices
Choice (4)  Response  

a.  2: 9 

b.  2: 3 

c.  2: 5 

d.  2: 7 

Question number: 3
» Rotational Motion » Rotational Kinetic Energy
Question
A body is rolling down an inclined plane. Its translational and rotational kinetic energies are equal. The body is not a,
(1) Solid sphere
(2) Hollow sphere
(3) Solid cylinder
(4) Hollow cylinder
Select the correct answers and mark it according to the following codes:
Choices
Choice (4)  Response  

a.  2 and 4 are correct 

b.  1 and 2 are correct 

c.  1, 2 and 3 are correct 

d.  1 and 3 are correct 

Question number: 4
» Rotational Motion » Rotational Kinetic Energy
Question
The moment of a uniform disc about an axis, perpendicular to the disc, at the centre is (M = mass, R = radius of disc). If the disc is rolling on its edge without slipping on a straight line path, the ratio of rotation kinetic energy to translation one is,
Choices
Choice (4)  Response  

a.  1 

b. 


c. 


d. 

