EAS102 Sections G & H
MIDTERM
Spring 2007
NAME:_________________________________
Read problems carefully and show work.
If you can not remember how to calculate some
thing exactly, make a good approximation and continue with the problem.
If you can not
get to the solution, but know how to do it, explain the procedure.
1.
Calculate the following
a)
The stiffness (k) of a spring as a function of temperature is given in the table below
Temp., C
20
25
30
40
K , kN/m
100
90
70
40
Estimate the elongation of a spring subjected to a load of
30 N at a temperature of
33 C.
b)
If the Excel formula shown below is entered in to cell A2 and then expanded to fill
multiple columns and rows.
Write the formula and give the numerical value found
in cell C3.
=row(A$3)*row()+column($B2)
c)
An engineer finds out that a power supply produces a potential drop that v has a
random
distribution between 10 and 15 volts.
What is the probability that the voltage
will be between 12 and 13 volts?
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2.
In order for a boat to float it must displace a volume of water that is equal to its
weight.
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 Spring '09
 Coffin
 Barge, following constraints L≤, Determine reasonable dimensions

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