
Concept explainers
a.
To find the dimensions of the stiffest beam.
a.

Answer to Problem 38E
The dimension of width
Explanation of Solution
Given Maximum of S is at
Calculation:
Pythagoras’ theorem,
Thus, the width is
b.
Check your answer in part (a)
b.

Answer to Problem 38E
Explanation of Solution
Given Maximum of S is at
Calculation:
Maximum ofS is at
c.
Compare the graphs.
c.

Answer to Problem 38E
Graph of
Explanation of Solution
Given Maximum of S is at
Calculation:
Rewrite the strength in terms of
Graph of
Graph of
Here the same graohs with
Graph of
The maximum occurs at
Chapter 5 Solutions
Calculus 2012 Student Edition (by Finney/Demana/Waits/Kennedy)
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