If the radius of the earth contracts to half of its present day value without change in mass, then the length of the day will be |
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a) |
24 h |
b) |
48 h |
c) |
6 h |
d) |
12 h |

If the radius of the earth contracts to half of its present day value without change in mass, then the length of the day will be |
|||||||

a) |
24 h |
b) |
48 h |
c) |
6 h |
d) |
12 h |

1 Answer

127 votes

From law of conservation of angular momentum, constant where is moment of inertia and the angular velocity. Moment of inertia of earth assuming it be a sphere of radius Also h |

127 votes

127