Question

Que:- If the earth suddenly contracts to the half it's present radius keeping it's mass constant, what could be the length of the day?

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Answer 1

HéY Héllø...

NamasKar#

So, The answer Is..: R=R/2. Now we know, Moment of inertia is directly proportional to r^2. So after shrink, the moment of inertia become 1/4 of the original.

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#ThankYou#

#*RamSharma*

Answer 2

Miss..according to me

The time will be 6 hours... As by conservation of angular momentum...we can easily get the final angular velocity of earth which will be 4 times the earlier one so the time period is Inversely proportional to angular velocity therefore it will decrease by 4 times..