Gravitation (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 1  5 of 84
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Question number: 1
» Gravitation » Kepler's Laws of Planetary Motion
Question
The mean distance of mars from sun is 1.524 times the distance of the earth from the sun. The period of revolution of mars around sun will be
Choices
Choice (4)  Response  

a.  3.88 earth year 

b.  4.88 earth year 

c.  2.88 earth year 

d.  1.88 earth year 

Question number: 2
» Gravitation » Energy
Question
A projectile is fired vertically upward from the surface of earth with a velocity . where is the escape velocity and K < 1. Neglecting air resistance, the maximum height to which it will rise measured from the center of the earth is  (where R = radius of earth)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 3
» Gravitation » Gravitational Acceleration
Question
Two planets of radii in the ratio 2: 3 are made from the materials of density in the ratio 3: 2. Then the ratio of acceleration due to gravity at the surface of two planets will be,
Choices
Choice (4)  Response  

a.  1 

b.  0.12 

c. 


d.  2.25 

Question number: 4
» Gravitation » Energy
Question
A body of mass 100 kg falls on the earth from infinity. What will be its energy on reaching the earth? Radius of the earth is 6400 km and g = 9.8 m/s ^{2}. Air friction is negligible.
Choices
Choice (4)  Response  

a.  6.27 ⨯ 10 ^{10} J 

b.  6.27 ⨯ 10 ^{8} J 

c.  6.27 ⨯ 10 ^{9} J 

d.  6.27 ⨯ 10 ^{7} J 

Question number: 5
» Gravitation » Universal Law of Gravitation
Question
A satellite of mass m is revolving in a circular orbit of radius r. The relation between the angular momentum J of satellite and mass m of earth will be –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

