Chapter 11 Questions Flashcards
1
Q
True/False: Under the influence of gravity, all objects fall at the same rate, regardless of mass.
A
True
2
Q
To achieve low-Earth orbit, an object needs a horizontal velocity of about _______ km/sec.
a. 7.9
b. 17,500
c. 8000
d. None of these
A
a. 7.9
3
Q
All objects moving under the influence of gravity must follow which of these trajectories?
a. Any of these are possible depending on the energy
b. Circle
c. Ellipse
d. Parabola
A
a. Any of these are possible depending on the energy
4
Q
As a consequence of the conservation of mechanical energy, a satellite in an elliptical orbit is going ___________ at perigee, and ___________ at apogee.
a. fastest, slowest
b. slowest, fastest
c. 8.0 km/s, 4.5 km/s
d. 8.0 km/s, 8.0 km/s
A
a. fastest, slowest
