Physics 3221
Fall Term 2005
Test 2, November 4, 2005
•
This is an open notes test lasting 50 minutes.
•
There are two problems. Problem 1 is worth 12 points and Problem 2 is
worth 8 points. The points for each part are marked.
•
Begin each problem on a fresh sheet of paper. Use only one side of a
sheet of paper.
•
Put your name, the problem number, and the page number in the upper
right hand corner of
each
sheet.
•
To receive partial credit you must explain what you are doing. Carefully
labeled figures are important. Randomly scrawled equations aren't helpful.
•
Try to draw a box around important results.
There are 2 pages including this page. Do not forget to look at all parts of the
problems.
Helpful integrals:
∫
−
=
x
x
x
xdx
ln
ln
∫∫
−
=
2
1
2
1
2
1
vdu
v
u
udv
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A single stage rocket takes off from Earth (it’s a well designed rocket so it
doesn’t waste any fuel sitting at the launch pad). The exhaust velocity is
u
, the
initial mass (at time
t
= 0) is
m
0
, and the fuel burn rate is a constant
α
.
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 Spring '08
 CHAN
 Physics, mechanics, Mass, Simple Harmonic Motion, Frequency, Physical quantities

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