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Variation of G Due to Height and Depth

A 75 kg ast...

Question

A $75 k g$ astronaut is repairing Hubble telescope at a height of $600 k m$ above the surface of the earth. Find his weight there.

A

740 N

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B

700 N

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C

650 N

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D

610 N

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Solution

The correct option is A $610 N$
$m g^{'} = m g (1 - \frac{2 h}{R})$
$= 75 \times 10 (1 - 0.185) = 610 N$

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