Rotational Motion (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 108  112 of 125
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Question number: 108
» Rotational Motion » Moment of Inertia
Question
The moment of inertia of a uniform circular ring, having a mass M and a radius R, about an axis tangential to the ring and perpendicular to its plane, is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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Question number: 109
» Rotational Motion » Torque
Assertion (Ꭺ)
The force of fiction in the case of a disc rolling without slipping down an inclined plane is .
Reason (Ꭱ)
When the disc rolls without slipping, friction is required because for rolling condition velocity of point of contact is zero.
Choices
Choice (4)  Response  

a.  Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ 

b.  Both Ꭺ and Ꭱ are false 

c.  Ꭺ is true but Ꭱ is false 

d.  Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ 

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Question number: 110
» Rotational Motion » Moment of Inertia
Question
The moment of inertia of a thin rod of mass M and length L about an axis perpendicular to the rod at a distance from one end is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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Question number: 111
» Rotational Motion » Torque
Question
A boy is pushes a merrygoround of radius 3 m with a force 50 N as shown in below figure. If cos 20 ^{0} = 0.9, then the torque applied by the boy is,
Choices
Choice (4)  Response  

a.  40 Nm 

b.  141 Nm 

c.  135 Nm 

d.  0 Nm 

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Question number: 112
» Rotational Motion » Torque
Question
A particle of mass m is moving in a plane along a circle of radius r. Its angular momentum about the axis of rotation is L. What is the centripetal force acting on the particle?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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