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If the mass of earth and radius suddenly...

If the mass of earth and radius suddenly become 2 times and 1/4 th of the present values the length of the day becomes

A

`24th`

B

`6th`

C

`3//2th`

D

`3h`

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The correct Answer is:
D
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AAKASH SERIES-SYSTEM OF PARTICLES AND ROTATIONAL MOTION-Exercise-II
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  18. A constant torque of 1000 N-m, turns á wheel of moment of inertia 200 ...

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  19. If 484J of energy is spent in increasing the speed of wheel from 60 rp...

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