NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics: Questions 1961  1965 of 2184
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Question number: 1961
» Gravitation » Energy
Question
With what velocity must a body be thrown upward form the surface of the earth so that it reaches a height of 10 R _{e}? Mass of earth M = 6 ⨯ 10 ^{24} kg, radius R _{e} = 6.4 ⨯ 10 ^{6} m and G = 6.67 ⨯ 10 ^{11} Nm ^{2} /kg ^{2}.
Choices
Choice (4)  Response  

a.  10.7 ⨯ 10 ^{3} m/s 

b.  10.7 ⨯ 10 ^{5} m/s 

c.  1.07 ⨯ 10 ^{4} m/s 

d.  10.7 ⨯ 10 ^{4 } m/s 

Question number: 1962
» Gravitation » Energy
Question
The masses and the radius of the earth and the moon are M _{1}, M _{2} and R _{1}, R _{2} respectively their centers are at distance d apart. The minimum speed with which a particle of mass m should be projected form a point midway between the two centers so as to escape to infinity will be
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 1963
» 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: 81 

c.  1: 9 

d.  1: 27 

Question number: 1964
» 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. 


Question number: 1965
» Rotational Motion » Radius of Gyration
Question
Four particles each of mass m are placed at the corners of a square of side length L The radius of gyration of the system about an axis perpendicular to the square and passing through its center is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

