Here's a gem from the "How to mess with student's minds" file:
Chapter 4, Problem 19 in Serway's, 4th Edition asks students to calculate
the muzzle velocity and time of flight for a bullet which is fired
horizontally by an astronaut standing on the Moon and which is then to
"travel completely around the Moon and reach the astronaut at a point 10.0
cm below its initial height."
Making the assumptions that this problem seems to call for, I get
time of flight = 0.35 s
muzzle velocity = 0.10 c
Who knew that the Moon was so nearly a black hole?
John
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A. John Mallinckrodt http://www.intranet.csupomona.edu/~ajm
Professor of Physics mailto:ajmallinckro@csupomona.edu
Physics Department voice:909-869-4054
Cal Poly Pomona fax:909-869-5090
Pomona, CA 91768-4031 office:Building 8, Room 223