12. (03.04 MC) At its greatest distance from Earth, the moon experiences a gravitational force of 1.78 E 20 N. The mass of the Earth is 5.97 E24 kg. The mass of the moon is 7.35 E22 kg. What is the distance between the Earth and the moon at that point if G = 6.67 E?11 N*m2/kg2? (1 point) 4.06 E 6 km 1.65 E 8 km 4.06 E 14 km 1.65 E 17 km

13. (03.04 LC) Two equal masses are floating in space. The distance between their centers is X. How would the gravitational force between them change if the distance between them doubled? (1 point) The force would be the same. The force would be one-fourth as much. The force would be one-half as much. The force would be twice as much.

14. (03.05 MC_ Ryan is riding a skateboard, accelerating from a standing start.. Which diagram represents the forces acting on Ryan? (1 point)