Essential University Physics: Volume 1; Mastering Physics with Pearson eText -- ValuePack Access Card -- for Essential University Physics (3rd Edition)
3rd Edition
ISBN: 9780134197319
Author: Richard Wolfson
Publisher: PEARSON
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Chapter 13, Problem 80P
You’re a structural engineer working on a design for a steel beam, and you need to know its resonant frequency. The beam’s mass is 3750 kg. You test the beam by clamping one end and deflecting the other so it bends, and you determine the associated potential energy. The table below gives the results:
| Beam deflection x (cm) | Potential energy U (J) |
| −4.54 | 164 |
| −3.49 | 141 |
| −2.62 | 71.9 |
| −1.22 | 9.15 |
| −0.448 | 0.162 |
| 0 | 0 |
| 0.730 | 4.13 |
| 1.29 | 16.3 |
| 2.13 | 34.0 |
| 3.39 | 115 |
| 4.70 | 225 |
Find a quantity which, when U is plotted against it, should give a straight line. Make your plot, determine the best-fit line, and use its slope to determine the resonant frequency of the beam.
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Chapter 13 Solutions
Essential University Physics: Volume 1; Mastering Physics with Pearson eText -- ValuePack Access Card -- for Essential University Physics (3rd Edition)
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