Four cylindrical rods with various cross-sectional areas and initial lengths are stretched by an applied force, as in Figure 17-10. The resulting change in length of each rod is given in the following table. Rank these rods in order of increasing Young’s modulus. Indicate ties where appropriate.
Rod | Applied Force | Cross-Sectional Area | Initial Length | Change in Length |
1 | F | A | L | ΔL |
2 | F | 2A | 2L | ΔL |
3 | 2F | 1A | L | 2ΔL |
4 | 3F | A | L/2 | ΔL |
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