The mass of moon is 1/81 of the mass of earth and the acceleration due to gravity is one-sixth of acceleration due to gravity on earth. The ratio of radii of moon and earth is-
A) 6/81. B) 4/729
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(a) The acceleration due to gravity on the moon is about one-sixth of that on the earth. (b) In order to the force of gravitation between two bodies to become noticeable and cause motion, one of the bodies must have an extremely large mass.
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