Reading:

Cutnell and Johnson, Chapters 5 and 8.

Problems for Review:

Reviewing these problems gives you good exposure to this week's main topics, in practice. All solutions are posted on our website |http://www.cc.emory.edu/PHYSICS/Faculty/Benson/141/review.html|. Quantitative solutions are also in the Student Study Guide.

Conceptual:

MCAT review problem 9 (on website).

Quantitative:

Chapter 5, problems 5, 11, 27, 39, 49.
Chapter 8, problems 3, 17, 19, 35, 41, 47.

Problems to Hand In:

Conceptual:

Use the following to answer questions 1--10:

The earth rotates once daily, as a rigid body about a vertical axis through the north and south poles. NASA wishes to launch a military satellite consisting of a payload of mass m= 500 kg. As launched from Cape Canaveral, the initial horizontal speed of the rocket is determined from the known latitude of . The satellite is deployed in a roughly circular orbit at a distance of 10,000 km from the center of the earth. The satellite will require 3 complete revolutions around the earth to complete each mission of photographing key military installations around the globe. The radius of the earth is 6400 km, the mass of the earth is kg, the universal gravitational constant is , and the constant of proportionality in Kepler's third law for the earth is .

1. Given its launch latitude (see figure), what is the satellite's initial tangential speed, as it rests on the launch pad prior to launch?
   1. 409 m/s
   2. 0 m/s
   3. 465 m/s
   4. 110 m/s
   
   
2. How long does it take the satellite to make one complete revolution about the center of rotation, when it is on the launch pad?
   1. 1 day
   2. 24 hours
   3. 1440 min
   4. all of these
   
   
3. What is the kinetic energy of the satellite as it rests on earth prior to launch?
   1. 0 J
   2. J
   3. J
   4. J
   
   
4. What is the gravitational potential energy of the satellite as it rests on the launch pad, as measured relative to the point ?
   1. 0 J
   2. J
   3. J
   4. J
   
   
5. What is the period of the satellite in its deployed orbit? HINT Use Kepler's third law.
   1. 1 day
   2. 48 hours
   3. s
   4. 166 min
   
   
6. How far does the satellite travel in completing each mission of photographing key military installations?
   1. m
   2. m
   3. 0 m
   4. m
   
   
7. What is the kinetic energy of the satellite in its stable orbit?
   1. J
   2. 0 J
   3. J
   4. J
   
   
8. What is the gravitational potential energy of the satellite in its stable orbit, as measured relative to the point ?
   1. J
   2. J
   3. J
   4. J
   
   
9. How much work was done to put the satellite into orbit?
   1. 0 J
   2. J
   3. J
   4. J

Quantitative I:

Complete these end-of-chapter problems (not questions!) from your textbook, submitting only your final circled choice for an answer.

Chapter 5.

22.

36.

Chapter 8.

18.

20a.

20b.

48a.

48b.

60a.

60b.

Quantitative II:

Chapter 5, problem 18.
Chapter 8, problem 29.

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