ISE212
Engineering Computing:
MATLAB
Spring_2007
Homework #1B
Due:
Monday >>> 2/26
Use the digital dropbox in blackboard to handin your HW to the TA.
1.
A catenary is a uniform cable, fixed at its two ends, which supports its own weight
(See sketch below). A catenary cable is attached at points P
1
& P
2
. The attachment
points are at a height h
1
and h
2
along an arbitrary
y
axis. The
xy
coordinates are
arbitrary except that the
y
axis must align with the down direction and the
x
axis must
have its zero point at an
x
value corresponding to the lowest point of the catenary cable.
The lowest point of the catenary cable is at a
y
value of
b
. In the coordinate system
described, the path of the catenary cable can be described as the following:
y(
x
) = b cosh(
x
/b)
Write an executable script file (mfile) that takes no input and returns the heights of the
two attachment points: the
y
coordinate of P
1
and the
y
coordinate of P
2
. In addition,
create a plot of the catenary curve that the cable follows. Your plot must assume the
following qualities:
(Name your mfile>>>
catenary.m).
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 Fall '08
 ?
 Cartesian Coordinate System, Microphone, script file

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