Questions
If polar ice caps melt, the length of the day
detailed solution
Correct option is A
In the process of melting of ice, external torque acting on earth is zero. Therefore, angular momentum (L) of earth about the axis of spin is conserved.L = I ω = Constant⇒ I . 2π / T = L ⇒ T = (2π / L) . IDue to melting of ice and action of centrifugal force, more mass is accumulated near the equator. So ' I ' increases and hence T also increases.Talk to our academic expert!
Similar Questions
A disc rotates freely with rotational kinetic energy E about a normal axis through centre. A ring having the same radius but double the mass of disc is now, gently placed on the disc. The new rotational kinetic energy of the system would be
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