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If earth contracts such that its radius ...

If earth contracts such that its radius becomes half without change in mass, then wieght on earth becomes …... times.

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The correct Answer is:
Four
`gprop1/R^2,R'=R/2`
`(g')/g=R^2/(R')^2=R^2/(R/2)^2=4`
`:.mg'=4mg` hence weight becomes 4 yimes.
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