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Concept explainers
When rubber is stretched, its elongation is initially proportional to the applied force, but as it reaches about twice its original length, the force required to stretch the rubber increases rapidly. The force, as a
(a) Curse-fit the data with a fourth-order polynomial. Make a plot of the data points and the polynomial. Use the polynomial to estimate the force when the rubber specimen was 11.5 in. long.
(b) Fit the data with spline interpolation (use MATLAHs built-in function 1nterp1). Make a plot that shows the data points and a curve made by interpolation. Use interpolation to estimate the force when the rubber specimen was 11.5 in. long.
Force (lb) | 0 | 0.6 | 0.9 | 1.16 | 1.18 | 1.19 | 1.24 | 1.48 |
Elongation (in.) | 0 | 1.2 | 2.4 | 3.6 | 4.8 | 6.0 | 7.2 | 8.4 |
Force (lb) | 1.92 | 3.12 | 4.14 | 5.34 | 6.22 | 7.12 | 7.86 | 8.42 |
Elongation (in.) | 9.6 | 10.8 | 12.0 | 13.2 | 14.4 | 15.6 | 16.8 | 18 |
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Chapter 8 Solutions
EBK MATLAB: AN INTRODUCTION WITH APPLIC
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