1
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
2
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
3
AIPMT 2003
+4
-1
The acceleration due to gravity on the planet A is 9 times the acceleration due to gravity on planet B. A man jumps to a height of 2 m on the surface of A. What is the height of jump by the same person on the planet B?
A
(2/9) m
B
18 m
C
6 m
D
(2/3) m
4
AIPMT 2003
+4
-1
A body of mass m is placed on earth's surface which is taken from earth surface to a height of h = 3R, then change in gravitational potential energy is
A
$${{mgR} \over 4}$$
B
$${2 \over 3}mgR$$
C
$${3 \over 4}mgR$$
D
$${{mgR} \over 2}$$
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