Gravitation (NEET Physics): Questions 66  70 of 82
Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2098 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: 66
» Gravitation » Gravitational Acceleration
Question
What will be the acceleration due to gravity on the surface of the moon if its radius is the radius of the earth and its mass is the mass of the earth?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 67
» Gravitation » Gravitational Acceleration
Question
At what height above the earth’s surface does the force of gravity decrease by 10%? Assume radius of earth to be 6370 km.
Choices
Choice (4)  Response  

a.  245 km 

b.  300 km 

c.  150 km 

d.  345 km 

Question number: 68
» Gravitation » Universal Law of Gravitation
Question
Spot the incorrect statements: The acceleration due to gravity ‘g’ decreases if
(1) We go down from the surface of the earth towards its center
(2) We go up from the surface of the earth
(3) The rotational velocity of the earth is increased
(4) We go from the poles towards the equators on the surface of the earth
Select the correct answers and mark it according to the following codes:
Choices
Choice (4)  Response  

a.  2 and 4 are correct 

b.  1, 2 and 3 are correct 

c.  1 and 2 are correct 

d.  1 and 3 are correct 

Question number: 69
» Gravitation » Gravitational Acceleration
Question
If the value of ‘g’ at a height h above the surface of the earth is the same as at a depth x below it, then (both x and h being much smaller than the radius of the earth)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 70
» Gravitation » Gravitational Acceleration
Question
What would be the angular speed of earth, so that bodies lying on equator may experience weightlessness? (g = 10 m/s ^{2} and radius of earth = 6400 km)
Choices
Choice (4)  Response  

a.  1.25 ⨯ 10 ^{2} rad/sec 

b.  1.25 ⨯ 10 ^{1} rad/sec 

c.  1.25 ⨯ 10 ^{4} rad/sec 

d.  1.25 ⨯ 10 ^{3} rad/sec 
