Gravitation (KVPY StreamSA (Class 11) Physics): Questions 1  4 of 12
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Question number: 1
» Gravitation » Gravitational Acceleration
Appeared in Year: 2010
Question
A soldier with a machine gun, falling from an airplane gets detached from his parachute. He is able to resist the downward acceleration if the shoots 40 bullets a second at the speed of 500 m/s. If the weight of a bullet is 49 gm, what is the weight of the man with the gun? Ignore resistance due to air and assume the acceleration due to gravity g = 9.8 ms ^{2}
Choices
Choice (4)  Response  

a.  75 kg 

b.  100 kg 

c.  50 kg 

d.  125 kg 

Question number: 2
» Gravitation » Gravitational Acceleration
Question
Consider two spherical planets of same average density moving around the earth in same circular orbits at same height R. Planet 2 is 8 times as massive as planet 1. The ratio of the acceleration due to gravity of the second planet to that of first is (2009)
Choices
Choice (4)  Response  

a.  8 

b.  2 

c.  1 

d.  4 

Question number: 3
» Gravitation » Orbital Velocity of a Satellite
Appeared in Year: 2010
Question
A planet of mass m is moving around a star of mass M and radius R in a circular orbit of radius r. The star abruptly shrinks to half its radius without any loss of mass. What change will be there in the orbit of the planet?
Choices
Choice (4)  Response  

a.  The radius of the orbit will not change 

b.  The radius of the orbit will increase 

c.  The radius of the orbit will decrease 

d.  The planet will escape from the star 

Question number: 4
» Gravitation » Gravitational Acceleration
Question
Consider two spherical planets of same average density moving around the Earth in circular orbits. Planet 2 is 8 times as massive as planet 1. And distance between Earth and planet 1 is twice than that of planet 2. The ratio of the acceleration due to gravity of the second planet to that of first is,
Choices
Choice (4)  Response  

a.  8 

b.  64 

c.  16 

d.  32 
