Let be the acceleration due to gravity at earth’s surface and be the rotational kinetic energy of the earth. Suppose the earth’s radius decreases by 2% keeping all other quantities same, then |
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a) |
decreases by 2% and decreases by 4% |
b) |
decreases by 4% and increases by 2% |

c) |
increases by 4% and increases by 4% |
d) |
decreases by 4% and increases by 4% |

Let be the acceleration due to gravity at earth’s surface and be the rotational kinetic energy of the earth. Suppose the earth’s radius decreases by 2% keeping all other quantities same, then |
|||

a) |
decreases by 2% and decreases by 4% |
b) |
decreases by 4% and increases by 2% |

c) |
increases by 4% and increases by 4% |
d) |
decreases by 4% and increases by 4% |

1 Answer

127 votes

and If mass of the earth and its angular momentum remains constant then and if radius of earth decreases by 2% then and both increases by 4% |

127 votes

127