1. When calculating the gravitational force between two extended bodies, you should measure the distance.

a. from the closest points to each body.

b. from the most distant points on each body.

c. from the center of each body.

d. from the center of one body to the closest point on the other body.

2. Which of the following objects has the greatest gravity?

a. You

b. Moon

c. Sun

d. Earth

3. Estimate the value of the universal gravitational constant from the following approximate measurements taken during the original Cavendish experiment one hundred kilogram fixed and one-kilogram rotating masses, ten-centimeter separation between fixed and rotating masses, one-millionth newton of force on each of the rotating masses

a. G = (10 to the power of 10) N m2/kg2

b. G = (6.7 to the power of 10) N m2/kg2

c. G = (6.7 to the power of 11) N m2/kg2 d.

d. G = (10 to the power of 12) N m2/kg2

4. Determine the gravitational force if two masses are 30kg and 50kg separated by a distance of 4m. G =6.67 x 10 to the power of -11N m2/kg2.

a. 62. x (10 to the power of -9 ) N

b. 6 x (10 to the power of -9 ) N

c. 20 x (10 to the power of -11 ) N

d. 78x (10 to the power of -11 ) N

5. Why does the Moon orbit Earth?

a. There is a magnetic attraction between the Earth and the Moon.

b. There is gravitational attraction between the Earth and the Moon.

c. There is a mechanical advantage between the Earth and the Moon

d. There is a chemical attraction between the Earth and the Moon.

6. The equation that Newton developed to calculate the force of gravity between two objects isIn that equation, the letter G represents the a. force of gravity.

b. combined masses of the objects.

c. universal gravitational constant.

d. none of the above

7. The gravitational force between two masses is 36 N. What is the gravitational force if the distance between them is tripled? (G= 6.673 x 10 to the power of -11)

a. 4.0 N

b. 9.0 N

c. 18 N

d. 27 N