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Physics 201
Exam 3
29 November
2007
Problem
Score
1
2
3
4
5
Total
t/O
Curve
Work 4 of the 5 problems.
Clearly indicate on this sheet which 4
problems you want graded.
For each part of each problem,
put your
final answer in the blank provided.
Use the space provided to show
your work.
Partial credit will be given for neat work that includes
appropriate
freebody
diagrams
and other important
intermediate
steps.
Check your units .
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1) A "Tsquare",
consisting
of two
identical
strips
of metal
connected
together,
is to be hung
by a hole P as shown.
a.
Where
should
the
hole be placed
in order
for the T
square
to hang rightside
up so that
it looks like a T?
(Give the x coordinate
and the
range
of y coordinates
of the hole that
satisfy
this condition)
L
eQ
W
P.
I
L.
..
x
W
L..
l
2
 

(.
x=
_
b.
If the Tsquare
is hung
by the hole
Q
(located
at the center
of mass of the
top part of the Tsquare),
how much work
is required
to rotate
it
by 180°?
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 Fall '08
 Walker
 Physics, Mass, Work, International Space Station, 2m, 3 m, Mir, 10 kg

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