Rotational Motion (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 1  6 of 125
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Question number: 1
» Rotational Motion » Angular Momentum
Question
Calculate the angular momentum of a body whose rotational energy is 10 joule. If the angular momentum vector coincides with the axis of rotation and its moment of inertia about this axis is 8 x 10 ^{7} kg m ^{2}
Choices
Choice (4)  Response  

a.  2 x 10 ^{3} kg m ^{2} /s 

b.  4 x 10 ^{3} kg m ^{2} /s 

c.  6 x 10 ^{3} kg m ^{2} /s 

d.  All of the above 

Passage
Consider a cylinder of mass M = 1 kg and radius R = 1 m lying on a rough horizontal plane. It has a plank lying on its top as shown in the figure.
A force F = 35 N is applied on the plank such that the plank moves and causes the cylinder to roll. The plank always remains horizontal. There is no slipping at any point of contact.
Question number: 2 (1 of 3 Based on Passage) Show Passage
» Rotational Motion » Angular Momentum
Question
Find the value of frictional force at A
Choices
Choice (4)  Response  

a.  4.77 N 

b.  7.5 N 

c.  2.5 N 

d.  All of the above 

Question number: 3 (2 of 3 Based on Passage) Show Passage
» Rotational Motion » Angular Momentum
Question
Find the value of frictional force at B
Choices
Choice (4)  Response  

a.  4.5 N 

b.  5.0N 

c.  2.5 N 

d.  All of the above 

Question number: 4 (3 of 3 Based on Passage) Show Passage
» Rotational Motion » Angular Momentum
Question
Calculate the acceleration of cylinder.
Choices
Choice (4)  Response  

a.  10 m/s ^{2} 

b.  6.36 m/s ^{2} 

c.  20 m/s ^{2} 

d.  None of the above 

Question number: 5
» Rotational Motion » Angular Momentum
Question
A wheel rotates with a constant acceleration of 2.0 radian/sec ^{2}. It the wheel starts from rest, the number of revolutions it makes in the first ten seconds will be approximately
Choices
Choice (4)  Response  

a.  32 

b.  16 

c.  24 

d.  8 

Question number: 6
» Rotational Motion » Angular Momentum
Question
If the earth is a point mass of 5 × 10^{24} kg revolving around the sun at a distance of 1.1 × 10^{8} km and in time T = 3.14 × 10^{7} s. Then the angular momentum of the earth around the sun is
Choices
Choice (4)  Response  

a.  1.5 x 10 ^{37} kg m ^{2} /s 

b.  1.21 x 10 ^{40} kg m ^{2} 

c.  1.21 x 10 ^{40} kg m ^{2} /s 

d.  2.7 x 10 ^{40} kg m ^{2} /s 
