The orbital speed of an artificial satellite very close to the surface of the earth is . Then the orbital speed of another artificial satellite at a height equal to three times the radius of the earth is |
|||||||

a) |
b) |
c) |
d) |

The orbital speed of an artificial satellite very close to the surface of the earth is . Then the orbital speed of another artificial satellite at a height equal to three times the radius of the earth is |
|||||||

a) |
b) |
c) |
d) |

127