Question

Dencity remaing constant if earth contracts to half of its pre prescient radius duration of day in minute
is​

Answer 1

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Now if density remains same, new moment of inertia will be I′=4I

And according to law of conservation of angular momentum (Iω)=(I′ω′)

ω′=4ω

Also, ω=T2π and ω′=T′2π

T′=4T

T=24hrs

T′=424

$\small \underline {\sf{T′= \ 6hrs \ = 360 \ minutes</p><p> }}$

Hence a day would be one-fourth of current duration

Answer 2

Answer:

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Answer:

Now if density remains same, new moment of inertia will be I′=4I

And according to law of conservation of angular momentum (Iω)=(I′ω′)

ω′=4ω

Also, ω=T2π and ω′=T′2π

T′=4T

T=24hrs

T′=424

\small \underline {\sf{T′= \ 6hrs \ = 360 \ minutes < /p > < p > }}

T′= 6hrs =360 minutes</p><p>

Hence a day would be one-fourth of current duration