NEET Physics: Questions 2038  2042 of 2098
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Question number: 2038
» 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: 2039
» Rotational Motion » Moment of Inertia
Question
What is the moment of inertia of inertia of a wheel of mass m and radius R having two spokes each of mass m? (The axis of rotation perpendicular to plane and passing through center)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 2040
» Rotational Motion » Rigid Body Rotation Equations of Rotational Motion
Question
A wheel has a speed of 2100 revolutions per minute and is made to slow down at a rate of 5 radians /s ^{2}. The number of revolutions is makes before coming to rest is
Choices
Choice (4)  Response  

a.  770 

b.  543 

c.  722 

d.  272 

Question number: 2041
» 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. 


Question number: 2042
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 
