1. Two masses are attracted to each other by a force of 3.4 X 10-2 N. What would be the force of attraction if the masses of each were doubled and the distance between them kept constant? 2. Referring to problem 1, what would be the force if one mass was doubled, the other mass tripled and the distance between them 1/2 the original separation distance?

3. Planet Z has a radius 10 times that of the earth and a mass that is 20 times as much. How much would a 160 lb man on the earth weigh on planet Z?

4. What would be the mass of the man in problem 3; a.) on the earth b.) on planet Z?

5. How is the acceleration due to gravity affected if the distance from the center of gravity is; a.) doubled? b.) tripled? c.) 1/4?

6. Calculate the acceleration due to gravity at an altitude of 6.37 X 106 m above the earth's surface.

7. How much would a 30 kg mass weigh at the earth's surface?

8. How much would the 30 kg mass in problem 7 weigh at an altitude of 6.37 X 106m above the earth's surface?