Rotational Motion (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 50  54 of 125
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Question number: 50
» Rotational Motion » Moment of Inertia
Question
Three point masses m _{1}, m _{2}, m _{3} are located at the vertices of an equilateral triangle of length ‘a’. The moment of inertia of the system about an axis along the altitude of the triangle passing through m _{1, } is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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Question number: 51
» Rotational Motion » Moment of Inertia
Question
Two discs of same thickness but of different radii are made of two different materials such that their masses are same. The densities of the materials are in the ratio 1: 3. The ratio of the moments of inertia of these discs about the respective axes passing through their centers and perpendicular to their planes will be in,
Choices
Choice (4)  Response  

a.  9: 1 

b.  3: 1 

c.  1: 9 

d.  1: 3 

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Question number: 52
» Rotational Motion » Values of Moments of Inertia
Question
A long rod has a mass of 0.12 kg and length of 1 m. The moment of inertia about an axis passing through the center and perpendicular to the length of rod will be
Choices
Choice (4)  Response  

a.  0.01 kgm ^{2} 

b.  1 kgm ^{2} 

c.  10 kgm ^{2} 

d.  0.001 kgm ^{2} 

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Question number: 53
» Rotational Motion » Moment of Inertia
Question
Two discs of the same material and thickness have radii 0.2 m and 0.6 m. Their moments of inertia about their axes will be in the ratio of,
Choices
Choice (4)  Response  

a.  1: 3 

b.  1: 9 

c.  1: 81 

d.  1: 27 

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Question number: 54
» Rotational Motion » Moment of Inertia
Question
A circular disc of radius R and thickness has moment of inertia I about an axis passing through its center and perpendicular to its plane. It is melted and recanted into a solid sphere. The moment of inertia of the sphere about one of its diameters as an axis of rotation will be
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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