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Mercury has 0.055 the mass of the Earth and 0.38 the radius of Earth. What would...

  1. Mercury has 0.055 the mass of the Earth and 0.38 the radius of Earth. What would a person, who weigh 150 lb on the Earth, weigh on Mercury?
  2. Mass 1 exerts a gravitational force of 30N on mass 2. What would the force be if the masses stayed the same distance apart, but mass 1 doubled?
  3. Mass 1 exerts a gravitational force of 30N on mass 2. What would the force be if the distance between them was tripled? The masses stay the same.
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