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The value of gravitational acceleration g at a height h above the earth's surface is g4 then (R is  radius of earth)

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Important Questions on Gravitation

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Let gh and gd be the acceleration due to gravity at height h above the earth's surface and at depth d below the earth's surface respectively. If gh=gd then the relation between h and d is 
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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 the earth. Then:
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The value of acceleration due to gravity at a depth of 1600 km is equal to
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The value of the acceleration due to gravity g at a point 5.0 km above the earth's surface and 5.0 km below the earth's surface are respectively
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A body is raised to a height nR from the surface of the earth of radius R. The ratio of acceleration due to gravity on the surface to that at a given height is   
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The diameters of two planets are in the ratio 4: 1 and their mean densities in the ratio 1: 2 . The acceleration due to gravity on the planets will be in the ratio 
 
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The ratio of acceleration due to gravity at a height 3R  above - earth's surface to the acceleration due to gravity on the surface of the earth is
 
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The variation of acceleration due to gravity g with distance d from the centre of the earth is best represented by (R is Earth's radius)