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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
detailed solution
Correct option is C
The acceleration due to gravity at a height h is given asgh=g1-2hRe where Re is radius of earth. The acceleration due to gravity at a depth d is given as gd=g1-dRe Given, gh=gd∴g1-2hRe=g1-dRe∴ d=2h=2×1=2 km (∵h=1 km)Talk to our academic expert!
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The weight of an object in the coal mine, sea level and at the top of the mountain are respectively W1, W2 and W3, then
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