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JEE PHYSICS MCQ: GRAVITATION

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Application +4 | -1

A mass '

\mathrm{m}

' suspended from a spring stretches it by

5 \mathrm{~cm}

when on the surface of the earth. The mass is then taken on to a height of

1600 \mathrm{~km}

above earth's surface and again suspended from the same spring. At this altitude the extension of the spring is (Radius of earth =

6400 \mathrm{~km}

)

View answer and explanation

Correct option: A

3.2 \mathrm{~cm}

Option A (

3.2 \mathrm{~cm}

) is correct because the extension of the spring is proportional to the weight, which changes with altitude.

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