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The weight of an object in the coal mine, at sea level and at the top of the mountain are $W_{1}, W_{2} and W_{3}$ respectively , then

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$W_{1} < W_{2} < W_{3}$

$W_{1} = W_{2} = W_{3}$

$W_{1} > W_{2} > W_{3}$

$W_{1} < W_{2} > W_{3}$

answer is A.

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Detailed Solution

$g_{n} = g (1 - \frac{2 h}{R})$ (At top of mountain)
$g_{d} = g (1 - \frac{d}{R})$ (At coal mine)
$g_{_{s}} = g$ (At sea level)
So the weight will be maximum at sea level.

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