If the radius of the earth is suddenly contracts to half of its present value, then the duration of day will be of RPMT 1999; AMU (Med.) 1999; AMU (Engg.); 1999 Kerala PET 2002, 07] (a) 6 hours (c) 18 hours (b) 12 hours (d) 24 hours

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#19 | Angular Momentum

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Angular momentum

Angular momentum of earth is constant.Iω = constant25MR2×2πT=ConstantT α R2, if radius becomes half then time period of rotation becomes 1/4 of the prvious value.Tnew=24/4 = 6hrs.

 

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