1
AIPMT 2005
+4
-1
For a satellite moving in an orbit around the earth, the ratio of kinetic energy to potential energy is
A
1/2
B
1/$$\sqrt 2$$
C
2
D
$$\sqrt 2$$
2
AIPMT 2005
+4
-1
Imagine a new planet having the same density as that of earth but it is 3 times bigger than the earth in size. If the acceleration due to gravity on the surface of earth is g and that on the surface of the new planet is g', then
A
g' = g/9
B
g' = 27g
C
g' = 9g
D
g' = 3g
3
AIPMT 2004
+4
-1
The density of a newly discovered planet is twice that of earth. The acceleration due to gravity at the surface of the planet is equal to that at the surface of the earth. If the radius of the earth is R, the radius of the planet would be
A
2R
B
4R
C
$${1 \over 4}$$R
D
$${1 \over 2}$$R
4
AIPMT 2003
+4
-1
Two spheres of masses m and M are situated in air and the gravitational force between them is F. The space around the masses is now filled with a liquid of specific gravity 3. The gravitational force will now be
A
3 F
B
F
C
F/3
D
F/9
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