Gravitation (NEET (NTANational Eligibility cum Medical Entrance Test) Physics): Questions 32  35 of 84
Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2142 questions. Access all new questions we will add tracking exampattern and syllabus changes. View Sample Explanation or View Features.
Rs. 550.00 or
Question number: 32
» Gravitation » Escape Velocity
Question
Acceleration due to gravity on a planet is 10 times the value on the earth. Escape velocity for the planet and the earth are V _{p} and V _{e} respectively. Assuming that the radii of the planet and the earth are the same, then –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 33
» Gravitation » Kepler's Laws of Planetary Motion
Question
The mass and radius of earth and moon are M _{1}, R _{1} and M _{2}, R _{2} respectively. Their centers are d distance apart. With what velocity should a particle of mass m be projected from the midpoint of their centers so that it may escape out to infinity–
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 34
» Gravitation » Universal Law of Gravitation
Question
If the period of revolution of an artificial satellite just above the earth be T second and the density of earth be ρ, kg/m ^{3 } then
(G = 6.67 ⨯ 10 ^{11} m ^{3} /kg. second ^{2})
Choices
Choice (4)  Response  

a. 


b.  ρT ^{2} varies with time 

c.  ρT ^{2} is a universal constant 

d.  Both a. and c. are correct 

Question number: 35
» Gravitation » Orbital Velocity of a Satellite
Question
Two satellites S _{1} and S _{2} revolve round a planet in the same direction in circular orbits. Their periods of revolutions are 1 hour and 6 hour respectively. The radius of S _{1} is 1.5 ⨯ 10 ^{5 } km and the radius of S _{2} is 4.95 ⨯ 10 ^{5} km. The velocity of S _{2} with respect to S _{1} is . The angular velocity of S _{2} as actually observed by an astronaut in S _{1} is –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

