GravitationEscape Velocity (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 1  4 of 6
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Question number: 1
» Gravitation » Escape Velocity
Question
The ratio of the radius of the Earth to that of the moon is 10. The ratio of g on earth to the moon is 6. The ratio of the escape velocity from the earth’s surface to that from the moon is approximately –
Choices
Choice (4)  Response  

a.  8 

b.  2 

c.  4 

d.  10 

Question number: 2
» Gravitation » Escape Velocity
Question
A spaceship is launched into a circular orbit close to earth’s surface. What additional velocity has now to be imparted to the spaceship in the orbit to overcome the gravitational pull? (Radius of earth = 6400 km, g = 9.8 m/sec ^{2})
Choices
Choice (4)  Response  

a.  32.85 m/sec 

b.  3.2805 km/sec 

c.  7.32 m/sec 

d.  11.32 km/sec 

Question number: 3
» Gravitation » Escape Velocity
Question
Acceleration due to gravity on a planet is 12 times the value on the earth. Escape velocity for the planet and the earth are V _{p} and V _{e} respectively. The ratio of the radii of the planet and the earth is 2: 1, then –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 4
» Gravitation » Escape Velocity
Question
Gas escapes from the surface of a planet because it acquires an escape velocity. The escape velocity will depend on which of the following factors:
(1) Mass of the planet
(2) Radius of the planet
(3) Mass of the particle escaping
(4) Temperature of the planet
Select the correct answers with mark it according to the following codes:
Choices
Choice (4)  Response  

a.  1.2 and 3 are correct 

b.  1 and 2 are correct 

c.  1 and 3 are correct 

d.  1 and 4 are correct 
