Chapter 23: Orbits And Trajectories

Question 1

To take advantage of the speed from the earth’s rotation, rockets should be fired to the

Answer 1

East

Question 2

If the launch is at the Equator, this adds roughly ___ mph

Answer 2

1000

Question 3

Type of rocket sent on a one-way trip to gather information

Answer 3

Sounding rocket

Question 4

What happens when the velocity of an object in orbit is increased?

Answer 4

It goes into higher orbit

Question 5

Moving from a higher orbit to a lower orbit requires the use of (thrust/retrothrust) causing the vehicle to (speed up/slow down) making it more subject to (gravity/centrifugal force), but as a result of a lower orbit, the vehicle actually goes (faster/slower)

Answer 5

Retrothrust, slow down, gravity, faster

Question 6

What orbit allows a satellites cameras a chance to photograph the earth’s entire surface?

Answer 6

Polar

Question 7

Satellite travels West to East around the 0° latitude

Answer 7

Equatorial orbit

Question 8

Path described by one body in its revolution about another body

Answer 8

Orbit

Question 9

Path of a body through space

Answer 9

Trajectory

Question 10

Property that causes a body in motion to remain in motion

Answer 10

Inertia

Question 11

What orbit maintains a virtually constant altitude above the earth’s surface?

Answer 11

Circular orbit

Question 12

A non-circular path around a body

Answer 12

Elliptical orbit

Question 13

Path a body takes, accelerating enough to escape gravity’s pull

Answer 13

Escape trajectory

Question 14

Point where a body orbiting the earth is farthest from it

Answer 14

Apogee

Question 15

Point where a body orbiting earth is closest to it

Answer 15

Perigee

Question 16

Velocity required for the payload to escape from the gravitational attraction of the planet

Answer 16

Escape velocity

Question 17

Represents adding together all the velocity requirements for all stages of the mission

Answer 17

Total Velocity Requirement

Question 18

The moment a rocket engine ceases to produce thrust

Answer 18

Burnout

Question 19

The velocity required to achieve the intended _____ must be attained by burnout.

Answer 19

Trajectory

Question 20

Ballistics is the study of

Answer 20

The arc of a non-orbiting body

Question 21

The trajectory of a _____ _____ is straight up.

Answer 21

Sounding rocket

Question 22

Moving a vehicle from one orbit to another is called a _____; if accomplished within the same orbital plane, it is called a _____ _____.

Answer 22

Transfer; Coplanar Transfer

Question 23

A Hohmann transfer is also known as a

Answer 23

Minimum energy transfer