Rotational Motion (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 91  94 of 125
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Question number: 91
» Rotational Motion » Concepts of Rotational Motion
Question
A disc is rolling (without slipping) on a horizontal surface. C is its centre and Q and P are two points equidistant from C. Let V _{P}, V _{Q} and V _{C} be the magnitude of velocities of points P, Q and C respectively, then
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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Question number: 92
» Rotational Motion » Moment of Inertia
Question
From a uniform wire, two circular loops are made (i) P of radius r and (ii) Q of radius nr. If the moment of inertia of loop Q about an axis passing through its center and perpendicular to its plane is 125 times that of P about a similar axis, the value of n is (diameter of the wire is very much smaller than r or nr)
Choices
Choice (4)  Response  

a.  2 

b.  5 

c.  6 

d.  3 

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Question number: 93
» Rotational Motion » Angular Momentum
Question
A uniform rod of length 4L is placed with one end in contact with the horizontal and is then inclined at an angle 60 ^{0} to the horizontal and allowed to fall without slipping at contact point. When it becomes horizontal, its angular velocity will be
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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Question number: 94
» 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 

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