A particle attached with a spring stretches it by \( 1 \mathrm{~cm}...

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A particle attached with a spring stretches it by \( 1 \mathrm{~cm} \) on hanging at earth's surface. Radius of earth
\( \mathrm{P} \) is \( 6400 \mathrm{~km} \). At a place \( 800 \mathrm{~km} \) above the earth's

W surface, the same particle will stretch the spring by
(1) \( 1 \mathrm{~cm} \)
(2) \( 0.88 \mathrm{~cm} \)
(3) \( 0.1 \mathrm{~cm} \)
(4) \( 0.79 \mathrm{~cm} \)
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