Physics 211, Homework Set #2

These problems are due Monday, Mar 22, at 5 PM. You may place your solutions in the mailbox outside my office door, or bring them into class.

The grading scheme for the homework set is as follows: three of the problems will be chosen to count for 10 points, and you may be given partial credit on them. You will receive 1 point for at least attempting each of the other questions. However, you do not know which of the questions will be chosen for detailed grading ... and therefore you should do them all.

1. Cutnell and Johnson, Chap 2, Conceptual Question 12.
2. Cutnell and Johnson, Chap 2, problem 7
3. Cutnell and Johnson, Chap 2, problem 9
4. Cutnell and Johnson, Chap 2, problem 14
5. Cutnell and Johnson, Chap 2, problem 25
6. Cutnell and Johnson, Chap 2, problem 31
7. Cutnell and Johnson, Chap 2, problem 41
8. Cutnell and Johnson, Chap 2, problem 53

9. Is it possible to shoot down airplanes with ordinary firearms? Consider the following four common weapons:
   • AK-47 assault rifle
   • M16A2 assault rifle
   • Uzi U-4 machine gun
   • Smith and Wesson .357 magnum with 125-grain cartridge

   Look up the muzzle velocities of bullets leaving each of these four weapons. Calculate the maximum height each can send a bullet (ignoring air resistance). Compare that to the altitude at which an ordinary commercial airliner flies.

This page maintained by Michael Richmond. Last modified Mar 8, 1999.

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