It’s c hope this helps :)
        
             
        
        
        
Answer:
The acceleration due to gravity is  times the value of g at the Earth’s surface.
 times the value of g at the Earth’s surface.
(D) is correct option.
Explanation:
Given that,
Radius = 4000 miles
We need to calculate the gravitational force at surface
Gravitational force on the mass m on the surface of the earth
At r = R

 ....(I)
....(I)
We need to calculate the gravitational force at height
Gravitational force on a mass m from the center of the earth,
At r = R + R = 2 R

 ....(II)
....(II)
Dividing equation (II) by equation (I)


Hence, The acceleration due to gravity is  times the value of g at the Earth’s surface.
 times the value of g at the Earth’s surface.
 
        
             
        
        
        
Answer:
When two forces acting on an object are equal in size but act in opposite directions, we say that they are balanced forces.
Explanation:
 
        
             
        
        
        
Answer:
Gravity is the centripetal force when the moon orbits the earth.