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1.
The acceleration to gravity at a height 1/20th of the radius of the earth above the earth surface is 
. Its value at a point at an equal distance below the surface of the earth in 
is about below the surface of the earth in is about
. Its value at a point at an equal distance below the surface of the earth in is about below the surface of the earth in is about
2.
Two satellite 
and 
go round a planet orbits having radii 
and 
respectivly. If the speed of satellite 
then speed of satellite is
and go round a planet orbits having radii and respectivly. If the speed of satellite then speed of satellite is
3.
An asteroid of mass 
is approaching earth, initially at a distance of 
with speed 
. It hits the earth with a speed 
(
are radius and mass of earth), then
is approaching earth, initially at a distance of with speed . It hits the earth with a speed ( are radius and mass of earth), then
4.
The distance of a geo-stationary satellite from the centre the earth (Radius 
is nearest to
is nearest to
5.
A satellite moves in elliptical orbit about a planet. The maximum and minimum velocities of satellites are 
and 
respectively. What is the minimum distance of satellite from planet, if maximum distance is 
and respectively. What is the minimum distance of satellite from planet, if maximum distance is
6.
Assuming earth to be a sphere of radius R, if 
is value of acceleration due to gravity at latitude of 
and 
at the equator, the value of 
is
is value of acceleration due to gravity at latitude of and at the equator, the value of is
7.
Two satellites of earth, 
are moving in the same orbit. The mass of 
is four times the mass of 
Which one of the following statements is true?
are moving in the same orbit. The mass of is four times the mass of Which one of the following statements is true?
8.
The ratio of acceleration due to gravity at a height 
above the surface of the earth and at a depth below the surface of the earth for 
radius of earth
above the surface of the earth and at a depth below the surface of the earth for radius of earth
9.
The weight of an object in the coal mine, sea level, at the top of the mountain are 
and 
respectively, then
and respectively, then
10.
As we go from the equator to the poles, the value of