Chapter 6

Question 1

ellipse

Answer 1

the orbit of a planet

Question 2

the time require to make one complete orbit around the sun

Answer 2

is proportional to the semi major axis of its elliptic orbit

Question 3

according to Kepler, the square of the orbital period of a planet is directly proportional to the

Answer 3

cube of the planets average distance from the sun

Question 4

Law of universal gravitation

Answer 4

newton, f=g(m1,m2)/r2

Question 5

the force of earth’s gravty on a capsule increases as it comes closer, when it moves to half its distance, the force is then

Answer 5

four times greater, square 2

Question 6

When the distance between two stars decreases to one-third of its original value, the force between them

Answer 6

increases to nine times as much, square 3

Question 7

two planets in space gravitationally attract each other, if both masses and distances are doubled, the force between them

Answer 7

stays the same

Question 8

a very massive object A and less massive object move toward each other, which force is greater?

Answer 8

both are the same

Question 9

inverse square rule

Answer 9

1/r2