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Gravitation

Physics
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JEE MainsNEETAIIMSEasy QsMed QsHard Qs
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A body weighs 72N on the surface of the earth. What is the gravitational force on it due to the earth at a height equal to half the radius of the earth?

A
16 N.
B
28 N
C
32 N
D
72 N
Medium
NEET
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A body of mass 'm' taken from the earth's surface to the height equal to twice the radius (R) of the earth. The change in potential energy of body will be

A
2mgR
B
31​mgR
C
3mgR
D
32​mgR
Medium
NEET
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A body weighs 200 N on the surface of the earth. How much it weigh half way down to the centre of the earth ?

A
150N
B
200N
C
250N
D
100N
Medium
NEET
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The ratio of escape velocity at earth(ve​) to the escape velocity at a planet(vp​) whose radius and mean density are twice as that of earth is:

A
1:2
B
1:22​
C
1:4
D
1:2​
Medium
NEET
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The acceleration due to gravity at a height 1 km above the earth is the same as at a depth d below the surface of earth. Then:

A
d=2km
B
d=21​km
C
d=1km
D
d=23​km
Medium
NEET
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Starting from the centre of the earth having radius R, the variation of g (acceleration due to gravity) is shown by which of the following options ?

A
B
C
D
Medium
NEET
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