Discuss the following:
Q: In his novel "From the earth to the moon", Jules Verne imagined that astronauts inside a space ship would walk on the floor of the cabin when the force exerted on the ship by the earth was greater than the force exerted by the moon. When the force exerted by the moon was greater he thought the astronauts would walk on the ceiling. (A) At what distance from the center of the earth would the forces exerted on the spaceship by the earth and the moon be equal? (B) explain why Vernes description of gravitational effects is incorrect.