Gravity Questions

1. As the distance between two masses increases, the gravitational force of attraction between them

        1) decreases             2) increases         3) remains the same

2. If the distance between two masses is tripled, the gravitational force between them becomes

        1) 1/9 as great         2) 1/3 as great         3) 3 times as great     4) 9 times as great

3. A rocket weighs 10,000 N at the earth's surface. If the rocket rises to a height equal to the earth's radius above the earth's surface, its weight will be

        1) 2500 N         2) 5000 N         3) 10,000 N         4) 40,000 N

4. If the distance between two objects of constant mass is doubled, the gravitational force of attraction between them is

        1) halved         2) doubled         3) quartered         4) quadrupled


5. An object weighing 20.0 N at the earth's surface is moved to an altitude where its weight is 10.0 N. The acceleration due to gravity at this altitude is

        1) 45 m/s2         2) 4.90 m/s2     3) 9.80 m/s2         4) 19.6 m/s2

6. An object weighing 16 N at the earth's surface is moved above the earth a distance equal to the earth's radius. The gravitational field strength at this new position is

        1) 2.5 N/kg         2) 4.9 N/kg         3) 9.8 N/kg         4) 4.0 N/kg

7. As the mass of a body increases, its gravitational force of attraction on the Earth

        1) decreases     2) increases     3) remains the same

8. The magnitude of the gravitational force between two objects is 20. N. If the mass of each object were doubled, the magnitude of the

        1) 5.0 N         2) 10. N         3) 20.N         4) 80. N


9. The gravitational force of attraction between two objects is 9.0 N. If the mass of one of the objects is tripled, the new gravitational force of attraction will be

        1) 1.0 N         2) 3.0 N         3) 27 N         4) 81 N

10. The gravitational force of attraction between two objects is F. If the mass of each object is doubled, and the distance between them is doubled, what is the new gravitational force of attraction ?

        1) 1/4 F         2) 1/2 F         3) F         4) 4F