A person normally weighs 800N at sea level, climbs to the top of a mountain. While on top of the mountain that person will weigh:

Zero

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Approximately

800 N

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Considerably less than

800 N

but more than zero

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Considerably more than

800 N

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Solution

The correct option is D Approximately $800 N$
When we go up from sea level at a height $h$ gravitational acceleration is given by the relation $g^{'} = g (1 - 2 h / R)$ where R is the radius of earth , as in this case h is negligible compared to R therefore g will not change considerably and due to that weight $m g$ will decrease but negligibly by small amount. Therefore it will remain approximately $800 N$ .

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